Well if you ignore the "All OC bad trolling."
This bit from Chris from AK is very interesting.
And I'll give a taste on Sebastian's thoughtful reply.
I have no problem with OC as a tactic in the right circumstances, and I have no problem with people who casually open carry as part of their normal routine. The problem is that I think the circumstances where it’s beneficial as a tactic are much much more narrow than most people open carrying are willing to admit. A lot of the benefits you mention an come about from mere casual OC, and don’t require putting activism or organization behind it, or open carrying some place just to make a point, or to get attention.
As always if you're going to do an activity as a political activist one should have a goal as to what your activity will result in.