I’m sort of surprised that they’re not banned already; dating myself but when I was at Uni in the late 2000s they were banned then. Despite probably not being very useful for cheating on nascent 3G!
This can easily be stopped. I don’t see how you would copy whole paragraphs or the working of a physics this way without easily being caught but this can mitigated against.
I mean, so many graded assignments are online now that very little technology is needed to cheat. I would guess that is the largest driver in increased cheating at universities.