Many people get mad because they are the ones that spend big $$$ on cameras, and spend time taking the perfect shots, and spend time setting up webspace to share their pictures.
Not to mention some people link to the pictures on your webspace, and some webhosts charge for amount of bandwidth used, and if someone else is posting it directly, you are getting charged for it.
What makes me mad about people stealing pictures is that all it takes is one polite email to *ask* someone if they mind it being used. I have been asked plenty of times by people who have wanted to use my pictures, and I have never said no. The people who don't ask - they just take them - are the ones who make me angry.
