It made no sense back when i started playing, but I got used to it, just like everyone else. I don't think it's a good idea to be changing things so often. It's not reaĺly a big deal either imo, since not a lot of people are doing it. Sure you can kill someone, but people usually have better things to do. There's always more cops hunting mw players than there are "vigilantes" and as long as it stays that way I don't think we really need any changes.
Does this feature push server further away from the CnR gameplay and closer to the DM one? Maybe, but more killing means more criminals to chase and that's a good thing, right? As long as it's not excessive of course, but this thing really ain't from what I see.
I honestly doubt this "pushes players away" any more than getting DMed without even having a wanted level, which is also a pretty common thing here.