I've solved toxic games and caused my team to rally with a single intentionally fed kill
"Warwick leave bot alone" "WW get out of bot" "WW go mid" "WW go gank top" spams retreat ping "WW go do dragon" "WW go farm camps" "WW gtfo bot" spams retreat ping "WW leave bot and don't come back" "WW if you don't leave bot right now I'm feeding a kill" tower dives 1v2 and dies WW leaves bot and doesn't come back I resume playing how I was and we win
When someone is doing something that trolls, for example this Warwick farming bot lane instead of jungling and stacking Devourer, I repeat myself , I ping, I do everything I'm supposed to do to get them to stop trolling. But when they absolutely refuse, I threaten to feed a kill. And when they continue, I follow through on my threat. I tower dive the enemy or I run in 1v4 or something and don't do any damage, just let them kill me so it's obvious that it was an intentional feed. Then I point out that I intentionally fed that kill because insert troll here was doing insert troll action here. I do that as a jungler when I have to beg my laners to not kill my camps because I'm a Devourer jungle. I do that as a laner when the jungle keeps taxing my waves and not actually dealing damage to the enemy champions in the lane. I do that when my allies keep coming to my lane and drawing their opposing laners to my lane so I can't farm (try to farm in ARAM sometime and you'll understand why).
When I do that, I get flamed by a the innocents. I respond with "blame insert troll here, I wouldn't feed if he didn't do insert troll action here. I'll feed another kill if he does it again". Sometimes I have to feed another kill before they realize I'm serious and that I will turret dive to make a point. It works wonders in games. I've seen it make trolls quit trolling. I've seen it make everyone else join me against the troll. It's never a full game of rushing mobis and zeals and repeatedly tower diving. I never alter my build from what I would build to win on the champion I'm playing. It's never more than one or two kills either, so it doesn't set us back so far we can't come back. Usually we actually DO come back and win these games because my intentional feed has ralled the team together.