A user has been using multiple unregistered accounts (with the same name and the same avatar). For reference, the accounts I've been able to find are 8280, 8281, 8284, 8289, 8294, 8308, 8309, 8310, 8311, 8312, 8313, 8314, 8315, 8316, 8317, 8318, and 8319, but I expect more to be added soon.
If these were registered accounts, then a moderator could send an e-mail to the user and explain the correct use of the site (which is to use only a single account). But since these are unregistered accounts, I do not know how the user can be contacted privately.
I've been leaving some comments on a few of the user's answers saying that multiple accounts should not be used, but I don't think my comments had any effect.
My questions are:
Is this creation of at least 17 accounts (in the span of 8 days), presumably by the same user, an abuse of how the site is used? If so, then what can be done to stop it?