i get carded all the time. i giggle..or shrug it off. the ONLY time i was offended was last week at evil mart. i had my daughter, and i was buying a 6 pack,
the dingbat wasn't going to sell it to me, because she assumed i was buying it for my daughter..because she couldn't discern that i was a mum with her kid grocery shopping.
other than that...it's really not that big a deal.
my cousin's mum got carded a couple weeks ago. she's 89. she was a little peeved, more confused, but totally flattered.
tl:dr ~ get over it dude.