Only if I wanted to end up on charges! Up here I couldn't own a pistol if I wanted to. About the only thing I could legally own/register would be a hunting rifle or .22 - and I think a long-barrel Winchester shotgun would look a little conspicuous on the morning commute. Besides, the only thing I have to worry about are protestors as I go onto campus...
Aside from that, years of data show that persons most likely to get shot in robbery, home invasion, etc, are those who try to respond with a firearm. About the only people who get away with it, statistically, are those trained well in firearm use - police officers, for instance....