You mean if I post a photo on the internet it may be taken?

And other people can use my picture if they want to?

Relax. Its not any worse than hackers getting into your computer, and you aren't afraid of hackers are you? They could be getting in at any time you send a message over the internet. Imagine being Jaques Louis David and being online, maybe surfing for good art websites or maybe he is just looking at porn. I am no man to judge. But imagine his horror as he sees his image promoting an ancient history website. I bet he would be pretty mad, but then I think that if he logged on here, he would experience the same addiction I have and not be able to pull himself away from this website.

That is my theory on it.