That's a valid point, but I'd say you can't be too choosy about your fate if you have to put your name on a list of that sort in order to survive. It's also worth noting that immigrants represent prospective organ donors as much as they represent prospective organ recipients.
Except for liver transplants - we all know that Mexicans are just a bunch of drunks!
The Texas Organ Bank coordinator told me that south Texas, with an almost 95% Hispanic population is the lowest area in the U.S. for organ donations. She is Hispanic herself.