its new york city what right to be armed? ditto dc.
See dogmush.
and its the random nature of the searches that is the deterrent value
Serious crimes and committed criminals are not deterred by random searches, severe penalties or anything else. You really think a suicide bomber is gonna be stopped by the possibility of being searched? What consequences would make someone planning on blowing himself up think twice about blowing himself up? Is there a (constitutional) penalty worse than being blown up?
Yeah, sure, there is a deterrent value. When I was in Israel, I always stashed my five inch blade outside the mall/religious site before I submitted my bag to be searched. I was successfully deterred from bringing my blade into the Western Wall Plaza. Heck, I even still remember the exact little crack in the wall of the nearby ruined church where I stashed it. Yay deterrence.
![rolleyes ;/](http://www.armedpolitesociety.com/Smileys/default/rolleyes.gif)
And the TSA has successfully deterred me from flying. Waffle Houses from here to Louisiana rejoice, but I don't think any lives have been saved. Yay deterrence.
Of course, the TSA has deterred a number of would-be suicide bombers from stashing their weapons in their carry-on bags. Yay deterrence.
Deterrence works for reducing the incidence of relatively everyday crimes by relatively normal people: speeding, drunk driving, hunting laws, etc. Ideologically motivated crimes are not deterred by the threat of detection or punishment.