Just happened to me also..
My reply is as follows..
Hello, my account has got a temporary ban on it due to one of my characters having an unacceptable name..
This would of happened around X hours and XX minutes ago, I am guessing from Alliance Battles but this has nothing to do with my appeal.
My appeal is straight forward and to the point, the character in question is called "I Got A Great Arse" (which I do by the way

).
Why a temporary ban now after nearly two years of having this character?
Why now after people have told me they reported the name like over a year ago and why now has ANET suddenly changed their stance on this name?
Those are the only questions I got about it, I could say that maybe the person who did report me wasn't offended by the name but by the fact they had a hard time in Alliance Battles against me so this is their vengeance in which case good on your for encouraging young people to cry wolf when they are upset because they came across a better player.
I could but I wont..

Just answers to the above questions would suffice thank you, and have a nice day.
Now I've actually had quite a few people IG say to me, "hey nice name" or "do you?" and all I say is "It's a matter of opinion"
I received a typical blowoff by anet in regards to this by basically saying "The support team have better things to do than entertain appeals" and neither of my questions were answered.
Thank you anet for the great customer support.
:P