DM= death match
People should be able to play however they want, within reason. If you want to blindly kill enemy team members who are not near the ball, it IS a valid tactic. The enemy players will become annoyed with you and avoid you. You have successfully made them leave the area (your goal, their goal, where ever).
People...stop complaining about how other people play. "It's annoying" is not a good reason to ask them to stop. This is still a fairly new game mode, and different tactics are still being tested by new Rageball players and old. If your team is losing and not all the teamies are helping, you can say "hey, give us a hand getting the ball" or "help us defend more". New players need direction. Still, let us all explore different directions other than "blindly follow the ball" OR "play how I think you should play."
If someone has any creative or conceivable way to defend WHY they are playing the way they are, let them be. Sheesh.
Death match is killing for the sake of killing. If you are killing with the aim of helping your team SCORE in Rageball by clearing an area of the field (even if its for 10 secs, or it seems pointless) it is not deathmatching, because you are killing with a winning purpose in mind...even if you are doing it poorly. There's nothing wrong with that. In fact, it can be a very good tactic for low agi builds, who are less mobile.