People who have mental problems with fiction and reality can have problems with any work of fiction. The old "putting on a towel and flying like Superman" bit, though I never heard of any story of that ever happening. And sure, kids like to play what they saw on TV, which is basically the same instinct as someone poorly rehashing a gag from something they saw last night at the watercooler. That's not quite imitating TV out of lack of reality, that's goofing off and having fun. Remember what happened with Beavis and Butt-head? One dumb trailer park kid sets something on fire, someone blames it on the show, and all the sudden, two characters who were never considered role models and created for an older audience are the worst things ever for children when children were never supposed to see them anyway.
The more I look at fiction, especially children's fiction, I still don't see why we need censorship of those guns. Super Heroes and good guys rarely use them (exception to the rule being Lucky Luke, but that's not something American kids can access easily), and gun violence is usually the use of force for either the law enforcement, or most likely the villain. Deep down, most fictitious media has a moral code, not so much out of pushing an agenda, but rather cliches are cliches for a reason and it's all about favorable storytelling. You have to let the good guys win (in certain media) because that's how we're programmed to be optimistic. If nothing else, it's escapism for the hopeless. Good guys always set a clear good example. Bad guys and characters the kids aren't supposed to emulate (out of fears that they'll go off the wrong path) are seen doing bad things, but usually getting some comeuppance. Heck, Beavis and Butt-Head get beaten up all the time. Who wants to be like that?