Originally Posted by Mark_T

Given the GA had not bothered to look at the boarding pass at that point, what else would you suppose he was basing his rash judgement on?

Does it really matter if it was age, clothes or anything else, the GA clearly made a judgement based on some form of bias rather than simply look at the boarding pass and avoid the crass error.

For the OP, this probably isn't the first or last time people will get your age wrong and you will have to deal with those who should know better making rash judgements.

Remind yourself that irritating as it is when 21 to be mistaken for 16, you will have the last laugh as you get older and you start to feel a lot better about being treated as though you are much younger than you actually are

For now just work on a few snappy put downs to use for the odd occasion that deserves it like this one ...