I can only imagine how much additional garbage-cleanup this must generate

Not that much, actually. And how much more it generates relative to how much we'd have if we nixed Anonymous Monk, very very little indeed, probably. As has been pointed out many times.

If enough people want to get rid of AM...

It doesn't work that way. This place is not a democracy, it's an oligarchy, verging on autocracy, plus a good dose of bureaucracy. ;-)

Eccentricities are not always bad

Eccentricities are generally good (imho).

Trying to second-guess what other people do and/or why they do it is probably a waste of time ...

That's the most insightful thing I've seen you write.