getahat, i don't think the first hypothetical works at all. if it has hermes stamped on it to initially convince you that it was hermes, and then it turns out to be fake, that is, not from hermes, then i wouldn't enjoy it because of the fraud. a fair hypothetical is what if you were walking and saw in a store window a magnificent bag that just stopped you in your tracks. you went in to look at it and it was made with superb quality, of exceptional materials, just felt like heaven and you loved it, would you pass on it because it was not hermes, despite your feelings. here's the thing, even with that scenario that i propose, it is as flawed as your first one because we are still only talking about the product and not the company. hermes will repair/recondition their bags. there are no other bags that have an institution behind them like that (in addition to the other details). if i bumped into 7k i would run out and buy a kelly immediately. the one i want is definitely under 6k, so i would give the rest of the $$ to my best friend who has less shopping money then i do. i would continue to support the agencies i support (in an admittedly small way - but it's what i can afford monthly) and use my vote to support politicians who share my values, and i would frequently feel like a bit of a heel because i spent the &$ on my purse, but the truth is that i would do it.
(also, as i don't want a birkin, i would be really pissed in the first scenario that it was fake because i wouldn't be able to sell it/return it for the bag i would want. lol).
one more thought - if a friend of a friend of a friend was an hermes craftsman and could make me my bag without "hermes" anywhere on it, but identical to the specs, with hermes material, for half the price and could guarantee me eternal service for the bag through hermes, i would buy it in a heart beat (if i had the $$).