Pull + stun + death (within 1.5s) is cheesy and NOT FUN.
Simply making guard remove stun or work through stun when used would fix this.
Guard's a long enough cooldown for this not to be game-breaking, unless you're running a DRK+2DRG+1whm premade and are just looking to continue griefing.
Urging people to use the "contact us" panel in game and put this into feedback.
Maybe if enough people do this, they'll un-suck frontline.