I'd say the worst I've experienced was in Tottenham walking back from the off-license about 3am or so and some homeless woman asked me for money, icr if I said no or just ignored her but she started to follow behind me shouting something... I was a bit creeped out I guess but my door was right there anyway and also there were a group of guys who always used to hang out around that area, so if she'd started to run or something I would have just gone to them