Well, mostly the people who make it here to these message boards if they DO have messed up trees are coming here to try to correct them. And I think almost everyone makes an initial mistake or two. My favorite story is that I added some people to my tree that my sister pointed out were just the same name and lived in the same area but were not the correct people. So while I was removing the wrong ones I marked the correct ones with "OK" in their name and later removed all the "OK" [I think I did forget one] and before we knew it there were other trees where the peoples names had OK in them forever.
So back to the topic at hand, the ones who do come here [to the message boards] are trying to do some serious research and learn from the people already here. People will misuse your information, but maybe eventually they'll fix it.
Or not. Just be an example of good work is the best we can do.