I'll take as stab and assume it means being asked for ID (at clubs etc). If I'm right then I haven't been carded since I was 16, unless you include all the times people refused to believe I was only in my 20's.
------------------ He hoped and prayed that there wasn't an afterlife. Then he realized there was a contradiction involved here and merely hoped that there wasn't an afterlife. - Douglas Adams, The Hitch Hiker's Guide to the Galaxy
I'm 22. Not that impressive huh? Some say that as one get older, his/her beliefs will soften and s/he will start accommodating others' views. Don't know if I choose to live as a scientist though... maybe getting older would mean being more extreme?