Not very happy about it either, I would rather wait 30 seconds and sign or enter my pin than just swipe. It's not a inconvenience to do so at all!
The thing is, you still have to wait for the transaction to be approved so it doesn't take less time except that the staff don't have to mess around looking for a pen.

I am not entirely sure, but I think because you don't sign a receipt or enter a pin, if you were to dispute that amount being purchased on your card when you get your cc statement, they would have to refund the money because they don't have any proof that you signed for it. It really is going to give all new meaning to kids' stealing from their parents wallets. Not that I think most kids do or would, but it is just another window of opportunity that is unneccessary.

Also, they have the same thing at Kmart.

I think the only way to opt out is with cash.