Wow. I honestly never thought of that. Can I marry you? Judging by your tag, I'm guessing you're male, which could be a problem in my jurisdiction (and religion...), but I'll make this exception. Seriously though, brilliant, sorry to Nexus and HoS, I won't be seeing you guys around much anymore. (CoS I don't mind so much, or Oculus, at least they give seven and eight badges each respectively)

This doesn't work. There was a blue post a while back when the dungeon finder first came into play saying that the random dungeons bypass your lockouts.

"Well, the basic system isn't actually even completely random. It is supposed to weight dungeons you've already done a little lower. The issue is that it's also trying to match you with up to four other players as quickly as possible who have relatively similar gear and have also been saved to X number of dungeons that day. The matchmaking system gets more lenient over time as far as item levels and saved dungeons are concerned, which still makes it pretty random. "

source: http://forums.worldofwarcraft.com/thread.html?topicId=22049517735&pageNo=2#28

@Silversol That's what I said decrease your chance, there is still a chance you will get them. It's hard to tell if it working or not but I haven't gotten Violet Hold or Nexus since I started extending their lookout and I used to alternate between them.

Of course random is random.