Landmines and TNT traps and such things of explosive might

[Crazylol5]

even though the line between TNT trap and grief has never been officially established.

Oh yes it has, I still remember the Viking war, when you couldn't walk over a road without it exploding. That's when the rule that you should never damage roads appeared. TNT is probably okay if you don't damage anything but nature like Bowser said.