That's crazy! I really hope they aren't going the way of Chanel! That's one of the reasons I buy H. They don't care how old or where you got your bag, as long it's authentic...they will care for it.
This might seem a bit overkill, but for all of my pre-loved purchases I used Amex + PayPal and have always taken them straight away to the spa. That way, I'll hopefully find out if H has any reason to refuse to work on the bag and can rectify the situation.
So far, they have accepted all of them without question.
I'm with you, that's why I sold all me Chanel's and moved on to Hermes for the quality repair/spa service. I email Hermes and told them I need to get my birkin repaired and I don't have to receipt for the bag and if it would be a problem and they told me to take it in so hopefully I won't have any trouble when I take my bag in after summer vacation.