Has this actually been an issue yet? Or is everyone just worried that people will point farm, not withstanding that getting to level 20 takes a solid afternoon of play?
If they're really not doing anything, the other team will just roll over them, resulting in very few points granted anyway as they'll have only spent maybe two minutes on the map.
I've been running into this more often than not.
I think it's easy points, plus people are confused as how to play, so play in a super defensive, non-engaging manner.
To test it out, I played normally, won a few games, basically did all the work myself, and then I played a few games where I just point buffed, healed people, did ammo, scavanged, etc, surprise, surprise, I made more points doing nothing than being the game winning hero. This is not the way the point system should be designed.
Punishing good play is moronic.