You can make it so npcs don't shoot at you.As far as squad based play?No.
Multiplayer is Deathmatch from 1-8 players.There is no team deathmatch yet.
You might search through the scripts forum.I think you will find more info there.
In case you can't find the search box it's at the bottom of the page in plain sight for all of us with psychic powers...lol.
Don't feel bad if you didn't know it was there.
Welcome to the forums and I hope as FPSC continues developing they can expand on concepts such as multiplayer and squad based combat.
FLa
Where you can find my demo:http://www.savefile.com/files/6970524