Paintball and Laser Tag players have discovered a way that grenades can be thrown in a controlled direction at extreme speeds. We do plan on fixing this exploit.
We understand this is frustrating exploit for many. We also understand that others enjoy the challenge of using it. However, it remains an exploit, and if folks would like to request that grenades be given new mechanics in a designed, supported way, you are welcome to request features like that in the PvP category of the General board.