There were fans following them around. My sister & her friends were in Seaside when they were filming the 3rd season. She said the cast was "heavily guarded" and in any pictures she took there was a crowd nearby when they were filming scenes. On the MTV boards, someone else posted a video while on the cable cars of Mike & Vinny at one of the snack stands and there is a huge crowd just standing around on the other side of the boardwalk.