I was on the jubilee line with DH, DD5 and DS2. A group of men (around middle aged) quite drunk, were playing a 'game' where one would place a dirty looking red beret on a passengers head, then all the others would jump/ dance around chanting 'red bereeeeet, the red bereeeeet'.
It was a bit annoying but I don't have anything against people just having fun. This is where it crossed the line for me: a woman was sitting alone. Sge asked them, politely, to be quieter. The leader twat tried to put the red beret on her, and she handed it back and said 'no'. After this, in my opinion their turned nasty, DH thinks I'm overthinking. The leader twat kept trying to force the beret back on the woman, saying really rude things (imo) like 'look at her, you know she wants it', 'she loves it really' or ' go on love, don't fight it just take it'. She was red with anger/embarrassment.
So when they danced over to put the red beret on DS2's head, I snapped and handed it straight back, saying loudly 'take your filthy hat and stop embarassing yourselves'. I'm normally non-confrontational to a fault but I was livid! DH thinks IABU.