There is a reason there were no mercs banned for multiaccounting. We don't share passwords. Seeing those banwaves shows a that a lot of the clans which were hit by the it had heavy password sharing.
The passwordsharing in the past, the easy way to use by proxy and the constant lobby for a form of legal multiaccounting is enough reason for me to believe it still happens.
I simply don't believe you could/ want to resist the temptation of an easy advantage.
Thats just my view on it, some may think you cleaned up your act after all this time but old habits die hard...