I would ignore every imp except the 3 best players on my server.. thus making me grouped with them at all times.. OOOH YEAAAH!!!!!
Not necessarily the best 3 players on the server, just ignore everyone but the best 3 that are currently queueing. Keeps your ignore list short and let's you play with whoever is currently playing. That seems like the best way to exploit this.
And if it wasn't obvious, I'm not a fan of this idea because it does seem so easily exploited.