Agreed for the most part. You have to consider, that sometimes in a close combat situation, especially when your team get surprised and/or ambushed, not everyone will have the time and/or oversight and/or calm to check all the firelines ..
Also some players that get roe for shooting teammates NEVER check where their teammates are. Which is just as 'bad' ..
So its not always the one that gets shot that is to blame

hmm ya i hate it when ppl camp somewhere on urban maps and TK u when u run around a corner,
and then complain: "Plz Report!!!"
i wont spam chat with report all 5 seconds...

And i hate it when i say to a teammate: "move out i cover" and then he gets in a Close Combat and blocks my fireline.
I wont shoot until hes dead or im sure i wont hit him...

But worst thing i hate are nub random spammers im bad spots with ar just shooting around with no target. If u want to move out, they may shoot u in the back. (a big problem on Bridge)

But if u just move out or jump suddenly just in the moment when somebody starts shooting suddenly its just bad luck, and it happens quite often. Its nobodys fault, but unlucky timing.
Hooah