I've seen users with NSFW profiles leaving (relatively more) inane comments and their profile is private, so their posts and comments are not shown. I dread the day we can no longer evaluate users behind the comments.
All that hiding them on Reddit does is pissing other users off because it breaks establish site's norms and expectations.
I got e-mail blasted on my linked e-mail here for a user called u/Loughla on reddit (who has deleted their account now). It's not me. It was never me. But oooohhhh boy did they upset somebody in an anime subreddit.
In other words, angry people absolutely will go the extra mile just for some feeling of vindication or other nonsense.
Massive changes in posting history was a very good sign that an account was a farmed or stolen account.
Makes it a lot easier for reddit to deny their bot problem.