-
I like @bothwell 's approach of calmly asking them to repeat what they said 4 or 5 times.
I don't recommend this as an approach, btw, just in case anyone thinks that was a suggestion of how to deal with street harassment when it happens - it's a thoroughly unpleasant experience. The fact that it is an interaction encourages them to come closer to you and the fact that it's an uncooperative interaction that doesn't follow their script encourages them to become aggressive almost immediately. Don't do this. It doesn't make them turn around with their tail between their legs, it does the opposite. You get more abuse at closer range.
I do it because my disability means I don't have much of a choice - I can either ignore everyone (including people like lucyh's "nice balance" peeps, or people asking me if I'm ok) or I can take everyone on good faith. I do the latter which unfortunately leads to some fairly scary moments.
I guess you've all seen this right? https://www.youtube.com/watch?v=fzF3OyRYX7I