The environmental concerns are probably glycol related. Pballs are filled with a mix of glycol, glycerine, and oil which is not particularly toxic, but large amounts can damage crops. I don't know what the decomposition rate of paintball paint is, but if FR contaminates their area at a rate higher than the decomposition rate than they could be affecting their neighbors crop growing abilities. Watch a round of speedball. I wouldn't be surprised if half a barrel of paint is dumped in a game day.
Pballers can be pretty obnoxious when they're hyped up after a game. Think about why you left pball for airsoft.
I'd be sad to see FR go, but you do have to think about all of the effects that it's presence causes.
Want nearly free GBB gas?