Some worst case scenarios: - Your tab freezes due to an infinite loop for a while until your browser notices and asks you if you want to kill the script. - Th

Some worst case scenarios: - Your tab freezes due to an infinite loop for a while until your browser notices and asks you if you want to kill the script. - The script downloads illegal content, and your ISP notifies authorities. - CSRF attack against a site you're signed into that's not properly secured. All of these things are things any site you go to can do. There's nothing special about `eval` that makes this site more dangerous.