Why does being on a bike in London cause so much conflict? (this time, a jaywalker)

I don't think giving her some shit would have acted as a future deterant, as I'm fairly sure having a load of bike and fakenger piling into her at 15ish mph served that purpose

You are right that in that some situations - perhaps her teeth are spread around Oxford Circus - the incident is enough of a warning, but be surprised (be very surprised) at how many people will get up off the floor and (especially in light of a helpful and empathetic cyclist) leave thinking it was all your fault.

It is these people that need to be reminded that their actions are not acceptable - for everyone's sake.