Our loot policy is no more dictatorial than your policy dictating how you'd like people in your guild to run. (certain weapons, specific rules as to how you can group) You run a thematic guild because it's fun for you. We chose to make people roll off loot they don't need because we believe that everyone who participated in the quest/raid should have an equal chance of acquiring it after it's determined the original puller has no need for it. That's actually fun for everyone since everyone get a 2nd chance, not just on other person.
Proxy rolls, trades via tells and other things of the sort are to me devious and greedy. But again that my thoughts on the subject.