Gnuffone, if you want more ladders, why don't you create one yourself; that's exactly what CLOT is for!
Brad, having an alt is (in itself)
not against the rules, see
http://wiki.warlight.net/index.php/Rules:
You shall not operate more than one WarLight account in a way that gives you an advantage in a game, tournament or ladder.
(emphasis added)
Only using it in an unfair way (having your alt play on the opposite team in a 3vs3 for instance) is forbidden. So if you'd like to level an account from scratch, go ahead, have fun!
Clearly marking it as an alt and linking from your main to your alt account and the other way around is, strictly speaking, not
required. However, it does seem like a good idea, even if it's just to prevent "misunderstandings" (that's exactly what I did for my own alt account
http://warlight.net/Profile.aspx?p=5613318402).
Math Wolf, do you know those "(..) and all I got was this lousy t-shirt" jokes (
http://ncse.com/files/images/ooze-front.jpg); how about an "I've been here since before WL 2.0 and all I got was this lousy badge"-badge? ;)