Ideas of questionable quality

[Vitatroll]

Claymores

Don't they already start with mines that never get used?

Are they directional? When I speak of claymores I mean instead of doing damage like a mine:

xxxxx
xxMxx
xxxxx

A claymore would do something like:

xCx
xxx
xxx
xxx
xxx

and would have directional proximity sensors. Anyone behind the boomline is fine, and could probably reset the device quite easily. Very tactical.