I recently read an interesting article on Writersdigest.com about aspiring writers who share their work on their blogs. Basically the article was about how some writers surf the Internet the whole day, checking out other writers blogs and websites and stealing their ideas.
I have always been a bit self-conscious about sharing my work, but now I definitely won't post anything.
Just think how scary that is. Anyway, she also said, that you shouldn't post your work because literary agents don't check aspiring writer's blogs. Therefore, if you want your work read, submit it to an agent or publisher by mail or email. Unless you want millions of people to read your work online.
So, be careful of what you post or where you post, because there seems to be quite a few people who lack creativity, therefore they have to steal other writers ideas. Trust me, it is not a nice feeling when someone else gets credit for something you thought up. I would know. I had a friend in high school who use to steal some of my ideas and even copy my homework and get all the credit for it, hence my paranoia.
Also be very wary of who you pitch or discuss your ideas too. You can never be too careful.