I'm not convinced that anti-social behaviour has increased either.
Why do you think that?
Because you see it more in the newspapers and on TV shows like Jeremy Kyle?
And everton, you've simply dismissed a major source of violence in the 80's (" the exception of with...") You can't just ignore factors that don't fit your agument.
Football violence was huge 25 years ago.
Violent crime is down nearly 20 percent over the last 10 years.
http://www.telegraph.co.uk/news/uknews/1360561 /Eighty-year-crime-rise-is-reversed.html
That's not an opinion based on anacdotal evidence that's a fact.
Maybe it's up where you live - I don't know but if so that's just an example of the dangers of making generalisations from your own experience