NTBFW plus more bodies

NOT TO BE FUCKED WITH has been discussed some -- whether you get armor piercing if you have it otherwise (you do), whether your harm stays 3 or takes whatever your weapon is (it stays 3, which is about as good as you get anyway), and so on. I was wondering what happens if you advance your gunlugger to have a group of additional hardcases, or join up with the Hardholder's gang, and how that stacks. If they're standing with their boys, do they benefit from NTBFW? If they do, do they count as an additional 10-15 bodies, or whatever a small gang is, or something else? If their gang does less harm than them (either due to a base harm of 2 on the gang's part, or the gunlugger taking the +1 harm move), which do they deal in combat?

I'd answer all of those based on the fictional situation.  I think if someone with NTBFW joins a small gang, it would often become a medium gang.  If the gang is supporting the NTBFW character, then maybe they get her damage but because they present a much broader profile, everyone gets their armor.  Unless, y'know, something else makes more sense.