Absolutely do not alter your playstyle to accommodate the whiners.

The scoreboard is proof enough of your value. Even if you are the only one looking at it, that is good enough. I have kindly referenced the damage done and killing blows many times, when the entire BG is on its soapbox.

"/bg Well, I seem to have 3 of the top 5 in total damage done, and have more KBs than any of you guys
/bg You're right, I'm worthless....."

or the ever popular response to "BOTTT"

"/bg Bots kill frostwolfs, I kill Alli (better than you)"

Just remember to keep it short and civil. If people get caught up in arguing, they forget to pvp, then you loose.