The guards hired to protect Mark Zuckerberg’s 21st Street home probably never expected that they would need someone to protect them.

However, that is what it has come to. After weeks of harassment between mid-May and early June, San Francisco Superior Court approved a workplace violence restraining order on July 8 against 61-year-old William “Gordon” Kinzer. On Tuesday morning Kinzer was arrested for violating the order, according to a neighbor and friend. It was the second time he has been arrested for violating the restraining order, according to police.

Facebook, Inc filed for the restraining order in mid-June on behalf of 15 guards who rotate through shifts at Zuckerberg’s Mission District house.

The order forbids Kinzer from coming within 500 yards of their workplace at the Facebook founder’s home at the top of Fair Oaks Street.

“I am concerned for my safety, as I believe Kinzer is unstable based on his actions and statements,” wrote Ramon Alcantar, a 44-year-old guard, describing Kinzer’s actions on June 1.

Ten guards filed declarations detailing Kinzer’s behavior, which often involved Kinzer ranting at them with threats.

“Kinzer walked up to the driver door [of my vehicle] and said, ‘Stay in the car monkey! You’re just a slave. How does it feel to work for a thug?’” wrote Keith Jacobs, a 47-year-old security guard.

Kinzer was also quoted in one of the declarations saying, “I have threatened people in Texas, you will see, I am smarter than [your boss], he is a Terrorist.”

Common themes in Kinzer’s threats include calling Zuckerberg a criminal, calling the guards “monkeys” or “slaves,” and invoking Christianity and God.

“Kinzer’s demeanor appears to be getting more aggressive each time he contacts me, which has caused me to be concerned for my safety,” wrote Alcantar.

His reference to threatening people in Texas could be about this past January, when Kinzer threatened police and city government there, saying that he would blow up the town of Driscoll, Texas, or on September, 2013, when he threatened to murder Judge Travis H. Ernst in Victoria, Texas, according to newspaper accounts and court documents.

After the latter, he was sentenced to 85 days in jail, which included the time he served in the psychiatric ward of San Antonio State Hospital, according to court documents.

Kinzer has been on Zuckerberg’s block since the end of April, staying with a friend, Bill Kennedy. According to Kennedy, whose home is just 166 yards away from Zuckerberg’s residence, Kinzer, who worked as a CPA, lived with him in San Francisco for three and a half years until he moved away six years ago. Recently, he returned to San Francisco, broke and homeless, Kennedy said.

“At first, he was too embarrassed to let me know he was back in San Francisco,” said Kennedy. It took him three weeks, according to Kennedy, to come ask his friend for help.

Kennedy had been letting him stay in his home, though he said that most nights Kinzer preferred to sleep in his car, which he parked on Fair Oaks Street. Kennedy said that after Tuesday’s arrest he tried to contact Zuckerberg’s lawyer to plead his friend’s case, but he has had no response. He wrote that his friend was a “mentally disturbed, homeless man” who now sits in jail instead of being able to live in the room that Kennedy was willing to lend him.

A police spokesperson said Kinzer was arrested on Tuesday at 8:48 a.m. at Fair Oaks and 22nd Street or a block from Zuckerberg’s Mission home. The earlier arrest was on July 9th, the day after the restraining order went into effect.

Kennedy has known Kinzer for almost 22 years. They met when Kinzer was doing accounting work for Kennedy, but they became good friends. Kennedy said that his friend has always lacked some common sense, but was never like this before. He described him as happy-go-lucky, and always smiling.

Despite Kinzer’s ramblings, Kennedy insisted that he is harmless, and sees the restraining order as an injustice to his friend. He would like to at least get the restraining order changed so that Kinzer could stay at his home.

“Gordon doesn’t have any malice in his body,” said Kennedy. “No one’s ever heard of a 1500 foot restraining order ever. Even for battery or domestic violence cases, it’s only a few hundred feet.”

From what Kinzer has written – including a bunch of signs that his friend convinced him not to distribute around the neighborhood – it seems that he thinks Zuckerberg is actively trying to kick him out of the neighborhood.

Kinzer also said to Capp Street Crap, that the guards’ stories are “‘twisted’ and said he’s not physically capable of hurting anyone due to physical disabilities.”

“He admitted to yelling at the guards, but said it was because they were taking up too much parking, parking for long periods of time without a permit and blocking a fire hydrant,” reported Capp Street Crap.

There is no sign, however, that Zuckerberg has personally had anything to do with it: though the restraining order is officially filed under Facebook, Inc, it is on behalf of the guards alone, as a workplace violence restraining order.

Despite taking up a parking space, the guards, neighbors said, have been a positive contribution to the neighborhood.

“I feel safer with the guards there,” said one neighbor.

“The guards have been outstanding,” said Burke Ray, who has lived on Fair Oaks Street for 37 years. He said that he talks to them daily when he walks his dogs, and that they have been nothing but nice.

Zuckerberg’s move-in was originally controversial, because he did a lot of construction, which was loud and took up parking spots. Since the construction ended, however, many neighbors said they haven’t had any problems with the Zuckerbergs. His next door neighbor even said that he got a gift basket of locally made goodies from the couple for Christmas.

According to Kennedy, Kinzer has a court date set for July 28 to appeal or readjust the restraining order.

“Ideally if he can get that down to 500 feet, that would allow him to live here,” said Kennedy.

Kennedy has confidence that his friend would be able to control himself and not bother the guards.