I have flagged this post as this is a witch-hunt that has no factual basis, only misguided speculation. The following is my explanation for why.
The members you call into question are real and different people, and arguing that "account creation" gives some sort of link to identity is a misnomer: account creation can be used to make an account for a friend without knowing the private key associated with the new account. This was especially useful before steemit had a registration process or faucet for new accounts. Therefor, the only fact you have is that these members communicated with each other. On a social network.
Secondly, there is no express rule about having multiple accounts. Clayop below questions the identity of @aizensou and accounts they are connected to, but this is not a reason to witch-hunt them. There are many valid reasons why accounts would share memo keys (for example, knowing the person in real life). In fact, I could pollute the data by using the same memo key and transferring dust, causing our accounts to also be linked. But to further put questions to rest, @steemcleaners has verified these users personally.
I encourage you to read our guide on Identity, here, and give up the attempts at witch-hunting members of our community.
RE: Who is Ozchartart, really? The real story behing the ozchartart controversy. (Sock Opera part 1)