There are people on the internet that take my pictures off the internet and put them on other websit

That happens millions of times a day on the internet. People will find a pic of someone on Instagram and post it on twitter or any other website. Thats nothing new.

Don’t post anything you don’t want other people to see or use.

Put people probably do it because of my looks.

I have the same problem that's one reason why I will never post any pictures of myself.

It might happen a lot "on the internet", but on this particular site it's against the rules to dox people, and posting the photo of another member should fall under that, unless they expressed consent... if you see anyone doing it, just hit the "report" button and it should be removed once the mods see it.