As the title says, claymore mines can only be detonated by touching off it (the same way as satchel charges).
They should also have a tripwire function since they are mainly used to secure a sniper's back, an entrance or just make a trap somewhere.
The tripwire should have a max range of extension from the mine position and should be tripped by bot friendly units aswell as enemy's.
About the friendly units tripping it, that maybe should be made available as a difficulty setting ?