Soo recently I have been hearing about.. hacking groups? What's going on? People are saying not to reply to anyone if they send you a weird link. Can someone pls explain??

The best way to protect your Scratch account is to make sure your password is hard to guess and that you are the only one that knows it. If somebody spams your profile or your studio with comments - turn off the comments and report the spam. And remember that the people that do trolling like that do it to get a reaction out of you. The more you give them attention, the more likely that they will continue to do it. Just report silently and go on about your day.