the problem is an issue of morality like amy said. truth is, there are millions of people who use illegal software. some of them dont even think there is a problem because you can easily aquire it online. but when you try to publish a commercial quality project and there is something that was used illegally and this "thing" is recognized, now you have a legal issue. in the u.s. there are pirate watchdogs! agencies who have a sole purpose of finding and procecuting people who pirate software. i have seen the fbi bust dj's and booths in the flea markets, so i know some people take it very seriously. i just think it's better to be safe. there is something called "guilty by association".