If I were a BG and was out to do harm, the first person that gets shot will be the guy OC'ing.
BGs out to do harm (we're talking robbery, rape, assault -- common street crime, not the one-in-ten million mass-murdering nutjob) aren't looking to shoot someone. That doesn't help their goals. Shooting someone in the course of a robbery, to effect an escape, or even to punish someone who "disses" them instead of complying certainly does happen, but starting off a confrontation by killing someone is pretty uncommon.
If shooting someone and then robbing them was the common problem, carrying a gun would be irrelevant. A criminal could just pick you off from across the street and rifle the corpse at their leisure.
Criminals, unarguably, do choose their targets. We talk about "failing the victim profile" a lot 'round here. What makes you appear to be a hard target, vs the next guy who looks lost, bewildered, inattentive, distracted, weak?
Some presume that wearing a gun openly, by itself or in conjunction with an air of alert observant consciousness, indicates that someone has the capacity and willingness to cause great harm or death to any attacker. Thus presenting a rather extremely non-optimal victim profile. Just short of a badge and a blue uniform, there would seem to hardly be a less inviting target.
Some suggest quite the opposite: That openly carrying a gun makes you more likely to be attacked, either due to the value of the object you carry for all to see, or due to the implied threat the carrier presents to the bad guy in an altercation.
Both sides have some plausibility, and like everything else, you have to decide what kind of attack you're expecting to come under. (
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Do you trust in, and want to take advantage of, the benefits to failing the victim profile that openly carrying a gun might give you?
Do you rather prefer to blend completely into the crowd of potential victims and accept that an attack may come, but you may still have the ability to draw and deal with it (even, perhaps, with "the element of surprise!")?
Hmmm... food for thought. Yummy!