FWIW I'm disturbed that a username can be objected to in that way - there are worse usernames out there and as Jester says a G-string is part of a guitar (although perhaps Jester is slightly disingenuous to imply that the clothing item isn't also implied?)
But as I say, there are worse names - a quick search of the leaderboard and I've seen usernames with "dick" unambiguously used to refer to genitals, a "cock" which I don't think was about poultry, an F word and two instances of the C word - although one of them I suspect might have just misspelled count... There are others, but I hope the point is made?
While I deeply appreciate the hard work that goes into running online Dominion, I think arbitrary standards of name-policing aren't fair, and clear guidance should be given to players if their chosen name is unacceptable, ideally at signup.
Thanks
Tim