KermitsDad
Alchemist
Players are not abusing anything by declining a quest, confirming their decline and then moving onto the next quest.the quest thing is a part of it, the clicking is a mechanism to discourage you from abusing it
If the designers didn't want players to have this ability then the game would be designed so that it wasn't possible to decline quests.
Furthermore the click, click, click mechanism that you have to go through to do this is not there to discourage anything.
It is there because we currently have a totally appalling GUI which should have been fixed long ago.