Gangs and Drive Bys? You mean the Scourge of the 20's, 30's, 40's, 50's (the decade which began the explosion of youth gangs), the 60's with the massive riots, the 70's with the birth and rapid explosion of all the modern gangs (who are now far less youth controlled), even the 80's began on a sour note.
That you would accept the entertainment news industry (which used to consider it low brow to report on this , so previously it didn't) over cold hard date collected by judges and police officers just says you don't care what the facts are, you want their to be massive youth problems so you'll pretend there are.
You want to pretend the past wasn't full of gangs , so you pretend it wasn't.
Don't get me wrong, even in the worst of times Im sure 99% of kids weren't in a gang and didn't know anyone who was, but the numbers are even smaller now, regardles of the news coverage which show a handful of incidents from among a population of hundreds of millions.