It's so unfortunate the way things are going. It seems to be all over London there are issues with gangs. I know from talking to a local resident in the street next to Loftus Road, that the gangs in Shepherd's Bush are a nightmare on non-match days. On a matchday, generally you see little of them, but once the fans and police are gone, they come crawling out again!
I also found Walthamstow a bit dodgy. Going to the dog track up there, you'd get the tube so far, to Wathamstow Central, then from there you'd get a bus to the dog track and back.....that bus ride was one of the most nerve wracking things you could do. I would never , ever sit up stairs, just didn't feel safe.
Same was true of going over to Hackney Stadium ( West Ham & Orient territory).... very dodgy, though I may go to Orient one day for a match, just for old time's sake.

But yeah, it seems to be all over, North, South, East & West.