I wanted to point out some inconsistencies in both of your arguments about "people taking 'your' cloth items"...
First, let me say I feel your pain. When you get a good gear upgrade drop while playing in a party it can be one of the little things that make your evening/party. Conversely, when you have several items drop and you lose the roll repeatedly even fairly, it can be frustrating. Add to that, someone who either CLEARLY cannot use the item or simply rolls against you out of greed, because they can use it too {but won't likely do so} -or because they have an alt, have an enchanter that DE's, etc., etc. - then it can make you quite upset in a hurry and ruin your night/party.
Now as to the original poster's extreme anger at "Huntards" who roll against them or generally others for what they feel is theirs by right...and to the person who posted below that person agreeing that they "Hate Hunters" also for rolling on cloth items....
My main is a "Huntard" as you put it. In all the parties I have been in, it has been my experience that it is NOT Hunters who deserve this reputation. I'll not mention a class, because that's not important. It boils down to who you are playing with and what kind of a person they are, not what class they are playing. MANY times I have played with people from guilds I had heard good things about, only to notice that they need-rolled on every single drop regardless of what the item was.
The bottom line is, you have a choice. You can explain calmly and intelligently about fair-rolling as we all know it and see if that works out. If not, you can leave the party and let them reap the downside of playing greedy. That's what I do. I mention to the person about fair-play regarding loot. they get one more chance, then I tell the party leader that if they don't address the situation and fix it, I'm going to have to leave the party; usually that works. If not I leave the party, Wave farewell and find another one.
To the person who posted below the O.P.:
I wanted to point out that in the one case, you made allowances for the Plate-wearer to fairly roll against the cloth-only armor wearer, and then yet expressed outrage against the "...Hunters who roll on cloth...." Once again, what is it with Hunter's being the defacto choice for anger even in situations where there is clearly someone doing the very same thing they are being ridiculed for? I'll have to say, though I NEVER roll against a cloth wearer for anything, there ARE cloth items that dropped I wouldn't mind using in certain specific situations due to the CRAZY stat-boosts some cloth items have, versus the LAME stuff that Hunter's get usually. {That is agreed on by the SUPREME HUNTARD CONTROL-COUNSEL that we are ALLOWED to roll on that is}
Hunters can use so many different items and so many items when used in SPECIFIC situations, can help them play a much more effective game. I can see where PLAYERS who are greedy and thoughtless could abuse this and cause ire in any situation. But BELIEVE me....Hunter's are not deserving of being singled out. It just got popular to do so long ago and now it's like every one's favorite joke.
FYI, you MAY think my opinion is biased, but as I said, my MAIN is a Hunter. I also have a Warrior, a Paladin, a Warlock, and a Priest, so I have been exposed to various party-dynamics. I am NOT being biased FOR hunters. I am AGAINST greedy and unfair play....that's all.
Good Journeys to ye'
-Prometheus.