When did newbies stop having that rule beaten into their head from the beginning?
"Kill stealing" (aka. 'helping' other people by attacking their monster) is actually pretty common in other MMOs, lol...where they don't have this finishing function as well. x.x
I usually only run missions with friends now so I rarely have this problem, but sometimes my friends still knock stuff out of my flame burst or whatever attack because they aren't paying attention, so it's still super annoying.