The criminals are crashing the party.

Lured by cheap drugs and free food, creepy thugs have infiltrated the crowd of protesters camped out in Zuccotti Park for Occupy Wall Street, The Post has learned.

“I got warrants. I’m running from the law,” boasted Dave, 24, a scrawny, unshaven miscreant in filthy clothes from Stamford, Conn. “I’m not even supposed to be here, but it’s as good a spot as any to hide.”

Wanted for burglary, the drug-addled fugitive said some of his hard-partying pals clued him in that the protest was a good place to be fed, get wasted and crash.

FAMILIES BRINGING KIDS TO WALL STREET PROTESTS

PELOSI SUPPORTS PROTESTERS

VIDEO: ‘OCCUPY WALL STREET’ PROTESTS ENTER FOURTH WEEK

“I’ve been smoking and drinking in here for eight days now,” said Dave, booze on his breath and his eyes bloodshot as he lay sprawled on a tattered sheet of cardboard. “I need to get some methadone. Every day, I wake up, and I’m f–ked up.”

Drugs can be easy to score — a Post reporter was offered pot for $15 and heroin for $10.

They’ve already fueled at least one violent incident, when a wasted nut job socked a medical volunteer in the face before others hauled the attacker away.

“We are trying to keep everything calm and work with the police, but there are some crazies in here,” said Paul, a security volunteer.

“The other day, there was a guy charging people $5 to use the McDonald’s bathroom. He was on LSD or high on something.”

But the creeps can’t give a bad name to the group’s overall anti-greed message, protesters said.

A coalition of religious leaders and their followers yesterday marched from Washington Square Park to the encampment with a makeshift golden calf in the shape of the Wall Street bull, leading protesters in such spirituals as “We Shall Overcome” and “Down by the Riverside.”

The crowd chanted, “We are the 99 percent!” — referring to the millions of Americans not among the top 1 percent of the country’s earners — along with priests, rabbis and imams.

“You are fulfilling the words of the prophet Isaiah. You have thrown off the yoke. Occupy, occupy, occupy!” shouted Warren Goldstein, chair of the history department at the University of Hartford in Connecticut.

The golden calf sat atop a brown platform that marchers carried on their shoulders. On the platform were the words “false idol.”

The clerics — some holding signs that read, “Jesus is with the 99%” — said they were there to support the movement.

“You have woken up all of us … We will stand with you in every city, every state and every country across this globe,” said Michael Ellick, minister at Judson Memorial Church near Washington Square.

Hundreds gathered around philosopher Slavoj Zizek as he gave a speech and answered questions.

“They tell us we are dreamers. The true dreamers are those who think things can go on indefinitely the way they are,” he said. “We are not destroying anything. We are only witnessing how the system is destroying itself.”

Some protesters have said that in addition to being against Wall Street greed, they also are for a withdrawal from Afghanistan and Iraq and more help for Haiti.

But as the protest ground on for a 23rd day, it was evident that there were challenges.

Zuccotti Park smelled like an open sewer — with people urinating and defecating in public.

And some couples have taken advantage of the free condoms distributed by organizers to do the nasty in full view of other protesters.

“It kinda makes me think of what Woodstock must have been like,” said one protester, Sarah, 19 from the Upper West Side.

“I haven’t hooked up with any guys … but one of my friends did have sex in a tarp with a guy last night.”

The free chow offered to protesters was boosting the crowd.

“People say they are here for the cause, but the real reason is the free food,” quipped Cameron, 26, of Jersey City.

“On my third day, they had smoked salmon with cream cheese. You know how much smoked salmon is a pound? Sixteen dollars. I eat better here than I do with my parents!”

Many of the protesters said they are here for the long haul — and predicted trouble if cops try to clear the park.

“When the weather starts getting cold, we’re already talking about bringing tents in here,” said Robert, 47, of Pennsylvania. “I’m not going anywhere.

“I lost my job of 22 years, and someone has gotta pay,’’ he said. “Civil disobedience is something we may need to keep this site occupied. If everyone does it at once, the cops won’t be able to do anything.”

Three protesters took their sleeping bags and tried to camp out on Wall Street near Nassau Street last night. When police told them to move, one demonstrator, Zachary Miller, 20, from California, was arrested for disorderly conduct, cops said.

At one point yesterday, a speaker from Washington, DC, told protesters how to break out of zip ties and handcuffs in case they get collared.

The protest vet, Ryan Clayton, 30, demonstrated how use a bobby pin to spring the cuffs open — while claiming he was “not encouraging people to break out of restraints.”

Additional reporting by Hannah Rappleye and Andy Campbell