Common decency counts as a reason
It does, actually. There's a build-in warning like the one on N&P if you're making super short posts if you're posting in a thread that's had no activity for a certain period of time. You can still post, but you better have a good reason to do so.
SV don't have a no necromancy rule, the built-in warning isn't to tell you it's forbidden, it's to tell you that it would be rude, to make a no content post at this time.
SV's rules on such things as doubleposts and thread necromancy, seems to me to be flexible in general, there's no hard rules against them, but if you made a habit of doing little content thread necromancy, you would probably be punished, and so you would for making 10 posts in a row, but it's not against the rules to post in a sleeping thread, if you have an actual question or comment, and if you occasionally doublepost then there's no problem, as SV's rules are here for the members, and so punishing is normally only done, when it either ruin things for other members, or when it's clearly done on purpose.
So I could spend a week writing short, shitty omakes for a bunch of popular but dead threads and then go around necroing them all?
Amazing.
Very very rude, but amazing.
That you would probably be punished for, as that would clearly be trolling, on the other hand if you just found a dead fanfic, loved it and wrote an omake for it, then that would be fine, but clearly doing it with malicious intent would not be.
Or this is how I understand SV's rules to be, they are there for the members, so punishment is generally meted out based on whether any harm was done, and whether it was on purpose.
