The greater Stack Exchange community has agreed that such names are to be allowed.
Are user names that represent domains allowed?
The accepted answer on that one is what the SE policy is on this topic.
> The identity you choose is a personal thing. If someone wanted to be called (for example) "Ubuntu Fanboi", we wouldn't be having this conversation. So is a username like "AskUbuntu.com" really all that different? It's not indiscriminate advertising... it's a username; and it's not a part of the _information content_ of this site. In short, **there is no "spam" to a username**.
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