Sometimes i have been called a kill stealer,, Here's my perspective...
I will always come to the aid of my countrymen, if i see my teamate fighting SURE i will come the help ,by the time you get your setup the teamate MAY have gone from defensive to offensive .
Now that your move is made you have 2 options
1: to take the shot or
2: brake off, in hopes you don't give the enemy a shot on you,, i mostly take option 1.
Now with that said there are 2 options ..
1: your teamate will call you a kill stealer or
2: Thanx for the help.
If you don't take the shot you have 2 options.
1: your teamate gives you hell for not helping him or
2: your teamate dies and you go back in kill enemy and THEN get called a kill stealer.
either way this game is about killing weather it's "stolen" or not.
I purposely don't try to steal kills, my intent is always to help my fellow teamates. but can easily be seen another way.
NUTTZ (exception, I ALWAYS try to steal *MOL* kills

)