That is actually a fairly common condition of probation. The thing to remember about conditions of probation is that the alternative is jail.
Yeah, but they rarely find anyone in violation of probation since the jails are usually overcrowded already, and Parole Officers don't want to be bothered with the paperwork. They violated him specifically because of the film. It had nothing to do with the fact that he accessed the internet against the order of the court. I'd like to know how long he'd actually been accessing the internet prior to the time the White House blamed the movie for the attacks.