They must be very clearly connected to each other as authentication is posted from each account using the same wallet.  I think a person uses each of these accounts and tries to quickly join each account in a bounty campaign so he forgets to use one wallet for a particular account due to which he uses one wallet for different accounts. In case of wallet transactions it is not completely proof that one account is alt of another because for any reason one friend can transfer crypto from another friend.  However, since a wallet is seen being used by multiple accounts through authentication post, it is clear that each of these accounts is connected.

It is not a crime to use multiple accounts on this forum.  However, if someone joins the same bounty campaign or signature campaign with multiple accounts, then he is cheating and due to this the accounts may get red tag by DT