Yeah, from a backend perspective it seems like it would be incredibly easy to detect and roll that back, and as far as I know their TOS would allow them to do it (GDPR notwithstanding)--but I don't know that for sure, maybe I'm just being cynical.

Actually, I looked up my old account and I guess I didn't delete it, but all my comments are syntactically correct nonsense, so that's cool.

And the mass edited comments have definitely not been rolled back. Maybe they have a "clean" version somewhere that they can sell to slop shops, but at least the reddit frontend experience is a little bit worse thanks to my edits. 😌