The argument of "best-in-slot" versus "best use of an item" is not new, and there is no right answer. One way or the other, someone has to lose the debate, and what each guild decides is their solution is a matter of generalized priorities, not disrespect to a single member.
Let's flash back to when my guild established its position on this topic:
This weapon was the best hunter offhand in the game back in Molten Core. 1% crit and 20 AP, and you can use not one but
two +15 agi enchants! Arrows and gunshots are just that much better with something like this at your hip! And then, there were the seal fate rogues... who saw a 10 DPS jump in their offhand damage, on top of the above effects. Best in slot for the hunter, but a rogue would see so much more use from it. It is a much bigger extreme of "wasted itemization," but it makes the stance easier to see and understand.
Now, that's not to say I agree with the call that was made. But I certainly can see the basis for it, have made similar calls myself (albeit in a system that allows 'off-priority' bids to still win out, just at a penalty), and find trying to turn a generalized stance on loot prioritization into personal disrespect to be near-sighted and selfish. If there was something else at work here, that's another matter entirely, but I think that the "life must be perfect or go somewhere else" call gets made entirely too often.
-Splug
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(Usually) Prot warrior:
http://www.wowarmory.com/character-sheet.xml?r=Illidan&n=Splug