I think a good deterrent against crime can be one of lunacy. For example, if you decided to go barefoot and wear your jacket inside out on the f train, chances are people will stay away from you. Also muttering some klingon war cries might drive the point home.
The Aquatic Plant Society Curator of the NY/NJ/CT LFS & CO2 Directory
ओं मणिपद्मे हूं