I meant you don't have to be amazed if someones (ab)uses your work for own profit if you put it on the web for free.

But you're absolutely right: readers (and in general people who use the internet) have their responsibilities too. Even if it's for free, if the author/artist/creator doesn't want you to use it without permission, you shouldn't. And if you do so, it's not only despicable behavior, but also stealing.

You actually made me change my point of view.