NeverEndingSupport - I'm with you. I think this is a sleeper issue that is going to be a big deal. I don't know if our system can even do this.
But, even if our systems can't block future recurring transactions before they hit the customer's account, we are still responsible for making this happen somehow!
We'll probably take advantage of the option of not having to block the future transactions if they don't provide us with a copy of the revocation within 14 days. But, even so, someone is going to have to monitor to process. And, of course, if they do provide a copy of the revocation within 14 days we have to do it anyway.