Word of warning to those who post plots/book excerpts online

One paticular user on Yahoo! (I'm not mentioning any names) has been taking parts of stories others have posted on the Books and Authors section and asked people to critique them as his own. For this reason I have to say be careful about how much you post!! If you post plots, many people will read them innocently but the same number of people may actually steal your idea. Be careful, if you want help with a story get advice on a little bit at a time. Don't post your whole plot and ask for criticsm. At the end of the day, YOU are your best critic. =)