My opinion is that in most of those neighbourhoods you posted, if you were a young, attractive woman walking on your own at night, or even in the daytime... you would be verbally 'harrassed' (if that's what you call it). Men would make comments, men would walk along side you to 'ask the time' or whatever. It's meant to be good-natured... just guys chancing their luck or whatever. Probably much like your current neighbourhood.
I lived in a sh*te area of London (near Hackney, and i worked in E1) as a middle-aged, not terribly attractive woman, and it happened to me every single day there. I can only think of 1 or 2 of those times that i was genuinely frightened... most of the time i just either laughed it off, ignored them, or told them to f*ck off, and they left me alone after that. It's just a game to most of them.