I already mentioned in two comments that multiple of the higher-ups in my guild had that. Yes we were hardcore, got the majority of world boss kills because of it, world buffs before raids, etc. But blizz made it clear that's working as intended.
That's part of the point we are trying to make. If it was only a handful of accounts (a minority such that exsited with a subscription model) then there wouldn't be a problem. The problem arises from when you, your guild mates, your friends guild and their mates, and your aunt Matilda all have 3+ accounts with most of the toons being lock summon alts. When that minority starts to become the norm (which blizz likely never envisioned happening with a pay wall) then there's a problem. That's where Kronos is at at the moment.