This crackdown on multis may have been thanks to a member who I will not name that created 30 accounts total, at least according to the mod team. It could be less than that, but given that the user had very identifiable traits and had admitted to at least some of the multis being his, it is reasonable to assume the figure is close to 30.
People may be unfairly sanctioned, but I don't know if many here would have siblings/friends that would be invited to join DART. If you consider that the sibling/friend could be unwilling to join hangouts and justify any claim of them being a different person, then it would otherwise be very hard to come to a rational conclusion on whether the accounts are used by the same people or not. I feel that the concern for this is justified, as the mod would otherwise see a member's "brother" votebomb their debates in favor of the former member. You could argue that it is bias, and that after said votebombing, the "brother" could no longer be permitted to vote for said member, but what then? If it really is the same person, they might make sufficient RFD's as a smoke screen for cheating in a debate.
This probably won't happen considering the inactivity in this site, but I can at least understand bsh's position here. This isn't to suggest that I want a crackdown, but I am not one to firmly oppose it either.