I'm starting a forum, and for my 'admin' username, I was toying with having a username that contained a company name and one other 'part'.
E.g. companyname-part2

I don't intend to say things on the forum that would in any way bring said company in to disrepute. Indeed I very much like the company.

Is there a legal problem here?
Particularly as forum creator, Am I running an un-necassary risk?