I live in nyc ( originally from miami) and I've been to several stadiums to support the fins over the years , including; the redskins, eagles, buffalo, etc and you never seen other teams fans taking over the stadium. In addition, ive been to soccer games all over south america where ive been locked into the home teams stadium until the small amount of victorious visiting teams fans left the area for fear of their lives. That to me is home field advantage.
Instead of the operation takeover in NYC, someone needs to take the bull by the horns and begin a movement for home games not just to have more of a presence but to intimidate opposing teams fans and deter them from thinking they can come to fins home games, get some sun and takeover the place. If it were me, I would pick the first wimpy loudmouth guy in a pats jersey and throw A beer at him or heckle him the whole game in front of other pats fans to show them that they should think twice before coming down here again.
Clearly, miami won't sell out until they begin winning again consistantly but fans can still assert themselves and make it uncomfortable for visiting fans by heckling/ abusing them without getting locked up of course. Culture needs to change!