"I'd like to see the boolean chart overlap of the people who sling an AR and go get coffee and the people who complain about Gay pride parades "shoving it in our faces"."Reader Joseph in comments to the Starbucks post.
The more I think on it, the more I think the "AR in Starbucks" is an almost exact analogy to the "bearded guys in wedding dresses kissing on the float in the Pride Parade". There's a weird boundary area around over-the-top speech that is legal, Constitutionally-protected, and probably inappropriate for the venue.
PS: Personally, I think the guys on the float should be carrying ARs. If you're going over the top, you might as well go all the way over.
PPS: Bobbi points out that the hypothetical dudes on the float have better legal standing than the hypothetical guy in Starbucks: They are, after all, not treating someone's private property as though it were the village commons.