NameCheap actually doesn't have the capacity to revoke domains as they're an eNom reseller. Enom's policy is that once you buy a domain, it's yours. With domains sales being such a low margin business I can understand their level of caution.
I had no idea they were a reseller. It's all the more interesting when you look at eNom's reseller pricing page http://www.enom.com/resellers/benefits-pricingplans.aspx. I hope NameCheap is getting better bulk rates than what is listed.
That's interesting, I didn't realize that. But don't they still have to deal with PayPal/credit card charge backs? Do they think those will be more rare that Bitcoin double spends?