i guess you can use ctrl-y to insta kill them, or the better option, ctrl-q to take them into your party then reform them out.

you need cheat keys enabled, but who doesnt have that these days?
enter the directory, find the notepad like ini file, add Cheat Mode=1 under program options, save on exit. then hit ctrl-space ingame, then type CLUAConsole:EnableCheatKeys() paying attn to the caps and spaces.
for rep and xp scores, i would reccommend you use ctrl q as you wont suffer penalties, or gain all that xp. simply take them in your group one by one, or a few by one, and let them fight amongst themselves, or boot them. they give amusing little goodbye speeches, and wont hassle you out! haha. you have fun now