well tom and Jerry is banned here in England. Because of those violent scenes although they weren't too bad, it was just influencing children's actions. A bit like the Simpson's cartoon Itchy and Scratchy. Even poor little Noddy was banned here to for being racist.
As for porn being accessible, I don't think it is in the UK, on the net maybe but then parents should really learn about controlling what is accessible. But I suppose some parents are just unable to really notice and have their minds occupied by other things. Personally, I think a child's safety should come first.