Toggle for "Tick to Kill"

An idea I had was if you killed someone, a little green tick would appear on the right or below your reticule, and if they escaped then a red X would appear in the same place. It would just tell me if I got the kill when they ran off the edge, or away. It would be toggleable, and also toggleable for position and type of kill:

Tick for:
All kills: Yes
(Fall kill: Yes)
Etc.
Position: Below shields

Would this be a good idea?

what’s wrong with watching the side notes?

this would seem useless.

most people have enough awareness when they kill someone they know it.