Someone should come up with a "pepper gas" belt. Maybe 4 cannisters of pepper gas, evenly distributed around your waist. Put the thing on in the AM. If 4-5 islamokazis dog-pile on you, pull a pin and everybody goes down puking. Granted, the intended victim gets dosed, but maybe while they're all laying on the ground writhing, some good guys can come to the rescue.
Beats the damned alternative...
Knockout gas. Excellent.