Is it bad to necropost here?

MCS

Donkey Kong
I'm just curious, since I've seen many users necropost here and not get in trouble. I've even brought up some old threads for the hell of it.
 
It's not technically against the rules but it's annoying and stupid and I consider it trolling if you do it too much.
 
What in the world do you mean by "necropost"?
 
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