One of my staff has a tatt on his arm, but I didn't even realise until he sensibly requested only long sleeve shirts for his uniform. It doesn't affect his skills or professionalism in any way, and the students don't see it.
Personally I find them very unattractive and try not to judge a book by its cover, but can see why an airline interview panel would. You could be immediately putting yourself at a big disadvantage. Discrimination it may seem, but you need them more than they need you.I used to get annoyed when people judged me because I had a diamond stud in my nose, now I'm 25 years older and still think it was wrong but am old enough to realise that that's the way things are and life isn't supposed to be fair. Self expression is all very well but you have to understand that not everyone is broadminded enough to accept that.