I can't say I agree since everybody got different influences. It start with Dro City rappers defining or coining "Drill" and that's 09/10 then the media caught on in 2012. Lamron & Wic City already beefing with STL and others.
I just think he influenced a lot of guys who saw he made it big and thought they could do it themselves.
Cdai, Rondo, Capone, now 600Breezy... They all love Keef. Maybe I'm wrong, but I definitely believe these guys are inspired to get out of the hood.
