Strip, if you fly out into the middle (No Man's Land) and call out for 1 v 1s I think you'll get what you want.
I've seen guys doing that every night and they seem satisfied.
Toad flying out to the center doesn't always work. I have had 1v1 fights interrupted there, by both friendlies (even when I asked them to stay out) and baddies. Granted it is rare but it does happen. I've also seen groups try to ambush you on the way out to the center.
Strip it isn't always gang or be ganged. Some of the best furballs I've ever had have been in the WW1 arenas. The pure chaos is exhilarating, The fact that you can take hits and keep fighting means I almost never land any kills, but it sure is fun.
It's true that people need to learn how to look at the roster and move to the low number side. I don't know how you get them to forget about their silly chess piece loyalty, but that would be a move in the right direction.
Just to clarify a furball is roughly equal numbers of red and green going at it. A gang bang is a group (three, but usually more) on a lone enemy.