Was she British or Australian? Those buggers seem to measure their shots incessantly and a 'double' really is 2 x 25/30mL 'shots' of alcohol. In any case - dumb FA.
And drummingcraig - don't laugh, I unknowingly bought a pair of those reef sandals last weekend, although mine have a bottle opener in the sole of both. I had to ask what it was (oops).
We're all aware of the 'no doubles' rule, but the 50mL vodka surely doesn't count as a double. I've NEVER had this happen to me flying QF/BA/US/UA/LX/DJ/DL etc! Where do Delta's Mojito's fit into all of this? More alcohol (supposedly) than half a 50mL bottle...