It seems like the best course of action here would have been to take down the website... and then just finish filming anyway. It wasn't actually worth it to the studio to send somebody there to confirm that filming had stopped. They were just tying up loose ends and getting rid of online promotion that was competing with them. If the film was really good and got a distributor, then there would have been a bigCorp there to swat away this frivolous lawsuit. If not, then it would have just flown under the radar.