People are just taking advantage of the fact that the on screen enemy grenade location icon is VERY broken/hardly ever works at all. Scrubs will do anything to make themselves look good on the leaderboards.

Grenade cook does not equal grenade spam. It is not at all the same thing. Rarely do I die from people cooking grenades and forcing me into an explosion. What I die from a lot is someone bombarding an hot spot with several genades and because the grenade location icon never seems to work nearly at all, there is pretty much nothing you can do but die. I know that I am going to die because I heard them bounce on the ground near me or being thrown, but I have absolutely no idea which way to move in order to escape the explosion. I would like to see this grenade location icon fixed and then afterward i am quite certain that grenade spam very quickly fall out of fashion.

if they can hit you with a grenade, they're within shooting range, so it's your fault for not being aware of who's around you. They also have audio cues, you can hear the high pitched noise right before they go off.

I do agree they need to fix the icon though, that's just unacceptable