I have lurked since 99 and have never seen any porn.
Having lurked since ‘02 all I can say is if anyone did post anything like that the abuse button be pushed instantly by every person I know here who saw it.
Most of the people pushing that button would also be wishing they could find the guy who did it IRL and explain to them how they feel about pedophiles in a simple and direct way that would leave no room for misunderstanding.
Sue them Jim, and make it as public as possible whether you win or not.