I've just had a couple of infuriating experiences on AirBnB and eBay where I wasn't even asked what currency I would like to pay in and just forced to use their DCC. When I was buying something on eBay, everything showed up in CAD and it wasn't until I looked on my credit card bill that I discovered I was charged in USD at their ripoff rate. Does anyone have any experiences disputing these charges? Would they actually go back and process your charge in the correct currency or would they just pull the money back from the AirBnB host/eBay seller and/or ban me from further activity on their site until I agree to the charge at their ripoff DCC rates?