That bug was fixed long ago, & I know it, when someone throws a molotov & he just going to die & the dying player commands /kill, it appears "burned to death" on screen. About the "fell to death" case, it's when you throw a grenade & the player is near or at stairs & have less HP, the grenades like throws him far & the player is death by falling. This guy death evaded in front of me but no evidence so didnt banned him.
Banned, thanks for reporting.