Who are you to define "pure pvp?" Why do you get to draw the line on what is and isn't pure? Are grenades unacceptable for classes without ranged attacks or interrupts? I see no reason why these are unacceptable when rumsey rum is ok. Different effects, but the exact same method of obtaining and in no way an "exploit."
Feel free to check the stats on any of my twinks. I rarely use any kind of pot/consumable, even while leveling. Hell, Noggenfogger and rumsey rum are about the only consumables I use, period. Have never used a faps or speed pot that I can remember. And no where did I advocate exploitable terrain. But by all means, continue to pretend you know anything at all about me or my playstyle.
The point is, you see any number of those "exploits" in any given pug. Doesn't mean that the pug situation is lesser pvp. It just means there are more variables that you have to be aware of and react to. If it's a premade then obviously rules for consumables should be in place prior to the start.
And last thing...anyone running around popping these in WSG is paying less attention to the game around them. Their fingers are also busy pressing another button. They are going to have slower reactions and less game awareness. Sure these can be "game-changing" in a small number of encounters,
but so can any other consumable (bombs, netherweave nets, weapon oils, etc, etc, etc).
tldr:bromrotoma is a
bit 
of a crybaby
