Ever sat there and had your queue pop a million times before you finally get into a match?
Occasionally this is due to people stream sniping. They'll keep declining the queue if they see that it isn't popping for the streamer that they want to play with/against.
The result of this is that other players have to sit there and keep clicking on our constantly popping queues, until we actually get into a game.
A simple fix to this would be to enforce a small window in which you cannot queue again, after you decline a queue pop (perhaps 2 minutes).