What makes me kill them? I'm playing a multiplayer game, and they're my enemies in said game; why wouldn't I kill them? Especially considering they chose to roll on that server type, just like I did. If I found some glitch to where I could gank people on carebear servers, I probably wouldn't abuse it because those people chose to opt out of it. Regarding low levels, I don't think of them as separate from high levels. They're all players of the enemy faction, so I kill them. I won't camp them though, unless they've earned it.