IIRC I was explaining that the potential dangers of walking through an estate in the middle of the night arise from the lack of footfall, and that the rougher parts of Hackney, Brixton, Tottenham etc are generally quite busy with people coming and going at every hour of the day, whereas if you were walking home pissed in the early hours of the morning and there wasn't a soul about, there's probably more chance if you getting robbed or attacked or whatever if you happened to encounter someone.
It was quite a few years ago now mind but always nice to be reminded that I live rent free in your head.