As far as I know a good number of CPA programs already eat the cost on refunds and if not right now you certainly don't get any money back when an order gets refunded that came from your adwords spending so I really can't see this becoming a huge issue, considering that your taking most of the risk out of advertising everywhere and paying for non-converting clicks..
I'm sort of surprised by how many people still fall for April fools pranks espically when so many are overly obvious, this year I think Matt Cutt's had the best prank.
Congratulations on hitting 1000 feedburner subscriptions, having my own blog has really made me appreciate how difficult it can be to get to 1000 so you have my respect for accomplishing it :)
