Never mind, I can't MULG tonight. Check the PPC, I'm trying to set something up with Randle, Shatakai, and all the PPC regulars.
No, if it's a legit post leave it. If it's spam delete it. The fact that it's a necro doesn't really mean anything. If it's mapmaker, give him a custom bump (if you guys have custom infracts)
If someone necroposts on a map you only delete the necropost if there is no posts after it, otherwise if there are posts after the necropost you give them a warning/infraction and leave it as is.