I'm honestly surprised that's not a much more common way of griefing (either specific or random targets) or disabling accounts to deny a victim access to their

I'm honestly surprised that's not a much more common way of griefing (either specific or random targets) or disabling accounts to deny a victim access to their e-mail after an attacker has gotten access, used it to reset passwords, and is now abusing the linked accounts (with the added benefit that the victim may be too busy being arrested to deal with the fraud). Probably because the group that has/is willing to handle CSAM is small enough that it doesn't overlap much the other groups (e.g. account hijackers, or people who want to grief a specific person and have the necessary technical skills and the patience to actually pull it off). For criminals it may not be worth the extra heat it would bring, but from what I've heard about 4chan, I'm surprised there is not a bigger overlap among "for the lulz" griefers.