I agree suicides are annoying. Especially when on porking missions, but even these bozos aren't the problem. The real issue is base defence.
I fly as a Bishop and last night I witnessed some pretty horrific base defence. Partially that's because I'm a pretty horrific pilot, but at least I was there. So were a few others (far better pilots) who were willing to get killed in the name of base defence. Overlag, just to name one. Wegaman, to name another.
No enemy went unharassed even if we lost to superior numbers.
My point is that sometimes we are too lazy or concerned about k/d ratios to jump into a disadvantageous fight.
Someone might argue that we we're ignoring the larger picture by focusing on our small part of the front, but keeping enemy fighters tied up is a strategy as well, especially if they get stuck trying to take one base, or a series of bases then you win by using up their play time. Eventually they will log/get bored and cease the attack.
Base defence. Suicides can't get near a target if there are defenders.