turning on friendly fire will attract plenty of a-holes to AH, constantly killing their teammates just to anger them.
for those of you who play other games that involve team play at some point, you know what i'm talking about.
my point is: friendly fire will cause some people to kill their teammates constantly, and the flood of people that would cancel their subscriptions because of it will cause HTC to lose money, and the loss of money might cause HTC to shut down a server or two (or something else) just to make up for the lost income.
to sum it up: NO!
however, the perk point deduction may deter some teamkillers, but not all of them.