Pauly -- who's from Rhode Island -- was on campus to visit a friend ... when word spread on Facebook that he was at the school. Suddenly, students began pouring out of the buildings so they could see Pauly with their own eyes.
In a matter of minutes, roughly 1000 students had surrounded the building where Pauly was holed up.
We're told Pauly's private security eventually grabbed him and stuffed him into his car. Uniformed police officers were also called to the scene to help control the mob.
Pauly finally managed to get out -- but police told the reality star he's not allowed to return to URI unless he coordinates with law enforcement first.