More reason why people should get a portable stamp that reads along the lines of "Choice of currency was not offered by the merchant and was unable to decline Dynamic Currency Conversion."

If forced DCC is becoming the norm, then we need to arm ourselves with the necessary tools to make it more easier to say no. Arguing about it with a low key minimum wage cashier or talking to the manager who have no control over corporate decision makers ain't gonna do nothing. So is spending your time writing the same thing over and over again. If they're forcing DCC systematically, we should be saying no to it systematically as well.

Got a forced DCC receipt?
Stamp it.
Create a template letter to your bank, attached scanned copy of forced DCC receipt with stamp.
Send it off (e-mail, fax, snail mail, etc)

The more banks get overwhelmed by this, the more they'll realize that their labor costs involved in reversing DCC isn't worth it.