Well, so far not overly surprised by the responses and I should like to clarify that this is not the technique I am considering myself: it was a general question for discussion. Playing Devil's advocate, if you will.
As far as condition 3 is conerned, if I am to obey the law, them I have no choice but to carry my pistol in Condition 3, or conceal my mahoosive revolver instead...
When the right to effective self-defence is denied, that right to self-defence which remains is essentially symbolic.
Freedom: Please enjoy responsibly.
Karma. Another word for revolver: because what goes around, comes around!