Tex Avery cartoons were well known for being violent WAY beyond the social norms at the time. Tex cartoons were about the characters literally destroying each other.
There are anecdotal stories of Fred Quimby vomiting everytime he watched 'What's Buzzin' Buzzard', such was the violence beyond his contemporaries.
Avery was far more shocking in it's time, than this trivial thing is, and despite watching many Tex cartoons, I never grew up carrying out violence. I think it's time people stop blaming cartoons and start looking closer to home. Kid growing up violent, Where is their influence? Do they have violent parents? Close Relatives? People are a product of their environment, not their bloody cartoons.