In this excellent post Matthias explains why you can't put all your trust in cat when inspecting a file:

https://ma.ttias.be/terminal-escape-sequences-the-new-xss-for-linux-sysadmins/

Let's all agree to never trust anything that has been posted on the internet without very thorough inspection. And let's especially agree to never run an arbitrary command or script found on the internet, without really close inspection.