Those of us who disagreed with OP's 'lighthearted' approach are not parents with 'perfect children' and have said so.
What I object to is the suggestion that an obnoxious hurtful comment, apropos of nothing, is treated as 'lighthearted'.
My DC are at times rude, hurtful and obnoxious. Absolutely. But there's a context - a row with siblings, being told they can't do something etc. I don't find it lighthearted, and I do deal with it.
They don't randomly say hurtful things to me or someone else tho. If they did, I'd definitely not see it as lighthearted & post here on a wry 'what are teenagers like' way.
Well that's absolutely fine for you EarringsandLipstick but why is the op not allowed to view things differently? She knows her own dd better than you after all and is able to view things in the round. You have no idea about all the other positive aspects about her dd's character, nor does anyone else on here who is commenting negatively about the op's parenting.
The op has only presented one brief negative incident here which many humourless people have pounced on in order to make themselves feel better by commenting on how superior their own parenting is to hers. Why is she not allowed to just vent a bit in a good humoured way? Maybe give the op some credit and have the humility to realise that she knows her own child better then you do, before you start with the buttock-clenching judgey comments?