Starbucks said Friday it would soon add porn-blocking filters to its public, in-store Wi-Fi. The move follows McDonald's, which disclosed this week that it had blocked the hamburger-eating public from accessing Wi-Fi-enabled porn at its restaurants.

"Once we determine that our customers can access our free Wi-Fi in a way that also doesn't involuntarily block unintended content, we will implement this in our stores," Starbucks said in a statement. "In the meantime, we reserve the right to stop any behavior that interferes with our customer experience, including what is accessed on our free Wi-Fi."

The group Enough is Enough and the National Center on Sexual Exploitation have been putting pressure on companies that provide free Wi-Fi to the public to block porn sites.

"This is a huge victory," Donna Rice Hughes, president of Enough is Enough, told CNN. "We're proud of Starbucks and McDonald's for stepping up to the plate. Internet pornography is a public health crisis. Parents need to know which family restaurants are safe from online threats."

Dawn Hawkins, the executive director of the National Center on Sexual Exploitation, said an online petition was partly responsible for the changeover.

“This change came after thousands of concerned citizens signed a petition asking for #PornFreeWiFi from McDonald’s and Starbucks, which was part of a larger campaign conducted by Enough is Enough in partnership with the National Center on Sexual Exploitation," she said.

Other major food outlets that have porn-banning, "family friendly" Wi-Fi include Chick-fil-A, Panera Bread, and Subway.