That certainly wasn't me; I don't use grenades anymore. And when I did use grenades (Before I had awesome weapons), it was only for one of three very special reasons:
1. Decoys to slow the advance of Skags. 2. Shock Grenades in the water for Lurkers and fish (Emergency Passageway/Flood/Bilge Block 3. Taking out the group of shelled Dragnizzzzzzz-whatevers (Wave 4, Abyss Banquet).
If you got caught it in and thought I was trollin', I apologize, definitely not my intention. I'm all business; I make a bee line straight for the goal, and use my wonderful rifle burst-fire to turn corners and blast everything from my line of sight.