If it's legal, it's legal.
Having said that, I find people who carry concealed and then advertise the fact by either concealing it poorly or telling everyone to be 'tacky'. Nor do I think it is a good 'public relations' technique.
It's like owning a fast car and spinning the tires every time a traffic light turns green.
This is of course a personal opinion of mine; no doubt someone disagrees. I carry concealed at every conceivable opportunity, but I do so with discretion. I also like fast cars and plan on buying myself a new Mustang in the near future. I will drive it discretely as well.