I've never seen one person kill a bhopper alone. A team on 6 bhoppers vs a team on legit players won't end well.
I've personally killed a bhopper 1v1, so it's fine. I don't think you said this, but I'm assuming in order for this to work, both players have to /team (Username) with eachother? Also, as stated previously by Elrak, a clan plug-in would be really nice.
Yes, of course. Otherwise the command can be abused if only one player has to /team. I do agree, a clan plug-in would be pretty sweet. :P