Perhaps it is a generational thing
I think you nailed it on the head with this statement. Say, 20 years ago and more, it was looked down upon and also usually associated to what you mentioned. Gang affiliation, sailors, freak show, and the like.
I have seen them on everyone from teachers, professors, doctors, engineers, programmers, and lawyers. To go along with your statement all of these folks are in their late twenties early thirties.