Is there a way for the game to identify when you are disarming a trap that you have set, and possibly give a bonus if true. It makes sense that disabling a trap that you yourself had placed would be easier that one another had placed.
Edited in;
Another thing I've noticed is arming traps can be a real bitch under walls and the like, would there be a way to arm them in inventory, or arm them by standing on top and using a hotkey to activate (only a single mine) the mine and give you the chance to walk off the hex.
To avoid multiple mine exploiting, you could just make the first explode if someone tries to drop an active mine ontop of another, or if he tries to activate multiple stacked mines.