How about a concoction of regular household ammonia cut with two thirds of water. Put it in a squirt bottle and hold off an army. Unless they are armed also. Rumor has it that it will stop an attacking dog in his tracks and will temporarily blind it just like pepper spray. I hope I'm right about the dilution formula. Maybe good against bears also. Maybe some one will try it and comment ; ) Bob Owens Tugly 26' Nordic Tug