But there could be abuse the way I see it. Since all alien factions are hostile to all human factions, if someone does enough of missions, and I mean lots, there's a chance that every human faction will become at least be neutral. Then again, the chances of this is very slim.
I wouldn't mind a challenge that puts me against Wilde/Nomad NPCs. I've fought Wilde Wraiths in a Wraith myself a long time ago over at the UK server and they are more than tough.
Doesn't work that way, the empathy is at zero. While the reputation between humans and Nomads is hostile, the zero empathy means that even if you kill as many Nomads as Jinx and Yoda put together your rep will not have changed in the slightest (other than the Nomads, Nomad Guard, and Wild being at -0.9 if they weren't already, as those factions -do- have empathy with each other).