Though they were not prosecuted for just taking video. The claim that did hold was for a felony that roughly translates to breaking and entering. For some other claims (like defamation in case of claiming that farm A does what was filmed at farm X), it was not possible to prove who did what, so it fell apart.

Some indecent farming was exposed, which is good. On the other hand, I understand that people are not entirely comfortable about groups of masked men appearing on their premises at night, premises near which their families live.