[qwer]

I was a CS TA 20 years ago and it was the same. Literally everyone was doing it to some degree.

Back then you would hand in printed source code. People would occasionally photocopy someone else's, scratch the name off the title page and write in their own name like I wouldn't notice something that stupid.

I actually caught some phd students in some cheating that was almost as blatant.

The professors generally don't care either. The whole thing burned me out pretty quickly. I realized the school was just full of a bunch of people going through the motions, and CS degrees don't really indicate any particular expertise on their own.