[Demisis_P2P]

Dividing the damage between players is stupid. That nerfs explosives in general but doesnt solve the problem at all because people can and will still put explosives on doors.

I believe doors are already linked serverside, so you could trigger an action between the external door that you can have to break down and the interior door that the explosives are on to detonate the explosives when the door takes damage.
Then players can still use explosives in general and can create traps around doors, to strategically block off entries or exits, just not on the door to lame.

Along the same line of thought, a snakecam item that tells you how many people are inside a level and if there are explosives within say 6 tiles of the door would be cool, and would save breaking down a door to raid a base only to find that the whole base is empty. Or if you know it's not empty, choosing an entry that has the least people in the room.