It's going to change.
I've always found that "deviants" - in my youth that was metal rockers with long hair or heavily tattooed people - normally turn out to be much more "normal" than the guy who looks like a Carphone Warehouse salesman. They're the ones who always have some deviant s**t going on, I find. Jehovas or Scientoligists or perverts. Today half the youths are tattooed (if not more) and I have to say when I see pilots with full sleeve tattoos, like I did the other day, I smile and think it's progress. Why not? Pilots are a reflection of society.
I have to take umbrage with FH1100's comments. I can accept that you would think twice about hiring someone with tattoos, that's your prerogative, but to say that if found out after that fact that would warrant his firing or ostracising, is quite frankly much more deviant than any tattoo would ever be.