A little more insight into Florida and street drugs vis-a-vis violence...In some places drugs dealers are sanctioned specifically to avoid an increase in violence.
Example, in Miami, FL, there is Grand Avenue, a historic street that could define "other side of the tracks", whereas Grand Avenue is a street where drug dealers openly hustle corners, but the road itself leads into Coconut Grove (an economic center in the heart of Coral Gables - a city where Miami athletes/celebrities/politicians call home). In fact the police commonly refer to dealers on Grand, almost endearingly, as Alligators. Because they just sit out on the corners all day soaking up sun and scuttle away when necessary. Ask any Coral Gables cop why they don't "shut down" the dealing on Grand Avenue, the response is, well when dealers can't make money with drugs they arm themselves and follow the road into Coconut Grove to commit robberies. As a result there is an unspoken agreement, Grand Avenue is the dealers' so long as there is no spill over into Coconut Grove. When times are good, in many of the drug neighborhoods in Miami not just off Grand Avenue, it is often said rich white people are the safest people in these neighborhoods because they are protected customers.
I am a criminal defense lawyer in South Florida, but its not exactly as you say, I don't have an interest in maintaining the laws as is. I assure you with different laws I wouldn't lose business, because there would be more lucrative work, namely legitimate business transactions (contracts, commercial leases, incorporation, etc...).