The US Airforce is trying to develop a spiderman net flinging rifle to bring down a hang glider, ultralight, paraglider etc in a non lethal way.
http://www.theregister.co.uk/2009/01/22 ... t_thrower/
http://blog.wired.com/defense/2009/01/a ... seeks.html
All they really need to do is pick up a radio and broadcast "Cold Beer in LZ".
That seems to work pretty well.
Doug
USAF CULAPS: Counter Ultra Light Aircraft/Paratrooper System
Moderator: Chip