Well...the one I have isn't often seen, either.
Speaking as a person who doesn't have any, I acknowledge that my basis for any comment is dodgy at best, but... if it cannot be seen under 98% of most conditions, why bother? It's like getting a tattoo on the bottom of your foot.
I have one fairly pathetic tattoo but it's not a UV, those almost tempt me to get another one, though. I'm all about novelty! But.. I don't think I've been under a black-light anyway in...I can't even remember when.
And do you have one?
http://en.wikipedia.org/wiki/UV_tattoo