i guess i'll re-post a TLDR of my response to this news then.
1. - if someone wants to be an asshole and grief, they will find a way. removing friendly fire won't stop the trolls.
2. - friendly fire stat tracking and banning is much easier then trying to track other various ways of griefing (such as pushing and beaching team mates)
3. - team damage reflection from PC works great, why can't we have that here?
except it didn't, the trolls started pushing people out of cover, pushing scouts out of bushes, over cliffs, drowning team mates, blocking movement, i can go on.