It's all pixels and polygons, no one actually Needs anything so I've always interpreted the Need button as "This is an upgrade for me. If I win I will use this in my main set for this class until I get something better."

Therefor I consider need rolling for glamour, seals, gil, retainers, etc to be an abuse of the system and think that person is a scumbag.

Form your own glamour farming group if you want a certain piece that badly, don't inconvenience other players with your shallow bullcrap.