Actually, this just happened to me on the Pride of Hawaii (NCLA). I was surfing on my own laptop on the ship's wireless and trying to find a restaurant that I had been to in the past in Kona called Oodles of Noodles (no longer there, RIP). The website used to be www.oodleskona.com. I tried surfing to it and the filter kicked in and said that I couldn't access that website on their server because it was considered "porn", LOL. It did say to contact the Internet manager if there was a problem with it. I just laughed it off and found my information in other ways.

Masaki