Here's a big one, the leader is bigapple541:
http://mln.lego.com/en-us/publicview/bigapple541.aspxSome of his dupes are:
-Bigapple5411
-Bigapple542
-Bigapple5422
-Bigapple543
-Bigapple5433
-Bigapple544
-Bigapple5444
-Bigapple545
-Bigapple547
-Bigapple548
-Bigapple549
Hmm, I thought there were more.
-Also, just because a name appears to be the same of another account, doesn't mean it's a dupe, which could mean there are "stealthy-dupes" out there. Iamafreak could be the dupe of I'llfeedyoutothefireants (yes, that's a real account, I made up Iamafreak).