Jack Thomson's influence was relatively minor.
I think the age when Night Trap, a game with nary a drop of blood nor single nip-slip, and whose goal is to save the girls trapped in a house with monsters, is mistaken for some kind of pornographic gore-fest where the goal is to rape and kill the girls, is over.
The US Supreme Court has already ruled that video games are protected under the First Amendment, and the game that was the focus of the trial was Manhunt: a game that's actually deserving of its reputation as a murderous gore-fest and disturbing content.