I don't mean harsh words so much as the tone and volume of the words. Like they say about dogs and other pets, they don't understand the words you speak to them so much as they react to the tone. You can say the exact same thing with different inflection and get completely different results with kids.
Another thing that has helped me is being into the same things they are. Having a common ground of video games, comics, cartoons and other so-called kid stuff makes our time spent together a lot more fun. The drawback to that is trying to get them to understand that the "card game show of the week" and other crap shoved down kids throats is not as cool as Star Wars or Akira. Having geek arguments with kids is such a losing battle its not even funny.
BTW, in regards to the previous thread FINALLY closing...that just proves my theory that once the Cos has spoken, the discussion is over. So put that in your flisum and flosam it. 😄