yeah the only time i roll on a valor set is if there is no warrior there or if he already has it. Usually in guild raids only so its pretty well organized and we know what people have/need. I've passed on lightforge items before when a friend of mine needed only 1 or 2 more pieces for the set.
I actually don't have any LF set parts yet, haven't gotten around to raiding all that much. If that were to happen in my guild I or the guild leader would definately lay the smack down on the person that did it.
Valor could be used by a paladin but Lightforge is better, so it is the general concensus that Valor = warrior and lightforge = Paladin.
oooh but yesterday i found a Destiny sword
http://www.thottbot.com/?i=9374