I actually do think it's worse now, and i will give you my version of events so to speak. First off the gangs that have been mentioned, the Krays, the Richardsons, were thugs, nasty, vicious and were involved in some pretty heavy stuff.. I too know that world, i didn't know them personally, but any number of people who were from the same background, area, families. The fact is most of those men were gangsters, but what they didn't do was go and batter some pensioner for a few quid, that was not their way, their areas of criminality were illegal gambling, racketeering, prostitution, but rarely drugs. They were not nice people for the most part, so not excusing them at all.
Nowadays drugs a large part of the problem, how to get it firstly, and if you have no money, you burgle someone's house, or beat up some poor pensioner and nick it. if they are on drugs they don't care a toss who gets hurt.. add in the fact that youths have access to more guns, knives on the streets than ever, the last time there was a knife amnesty thousands were handed in...
I never had a problem ever with walking around London, either alone or with a mate, not ever, but i do now.
The photo of that poor soul is horrible, and there are plenty more where he came from...