Most people do not care about anyone but themselves while playing this game. It's a case of maturity. They do not care "how" they get a kill, but rather just getting the kill itself. That's why people fire on ho's, high deflection shots, gang bang, vulch, cherry pick and other things.
It doesn't matter how they get a kill, they just want a kill.
What they fail to realize is that this game isn't about getting kills. It's about having fun with the person you are fighting with and against.