Would You Prefer Your Receipts to Be Paperless?

Public Domain. MaxPixel – A stack of paper receipts

The New York Times reports that more and more stores are getting rid of paper receipts and offering to send electronic versions by email. This is a good thing if you don't like handling the BPA-laden thermal papers, and think Google is more secure than a shoebox, or a bad thing if you care about stores being able to track your purchases (which they are doing anyways if you use a credit card). What would you do?