*NEW* gang wars!

[Munch]

Third, make up some good rules: like for example no snipers and grenades, no "free-killing" etc.

I think that'd be a little hard to control. Any Admins keeping an eye on this whole event, AND other players in the server, sorting reports out and stuff would have a much more hard time looking out for someone who randomly shoots at another person.
It'll just be a little harder to organise, you can't just stay still, look at who isn't fighting then go fight them, and even if you did others would do the same and there'd be a 2vs1 so it'll still be unfair.