[These cases have been closed. If you would like to appeal the decision of the hunter please open a ticket on the help page and the case will be looked into by a second hunter.]
Not saying all of them are multis. If you look at the join times/dates it helps. Occasionally you will find one or two that don't match the rest. Most likely these are the noobs who don't know any better and are doomed.
Something may happen. The first bust of this kind was made by Twill against han solo or somethign there is a post on here about it. So now Twill has to go through all the others who are doing this and bust them so have to give it some time.
These accounts, except for claytonmugge, have been dormant for a month now and they do not appear to be multis with each other nor of anyone else. This just looks like a case where new accounts joined one after the other when searching for a game to join.