You have to be careful sometimes when abroad and using an ATM that you don't accept their exchange rate, I think a lot of people get caught out by this.
I was in Sorrento last summer, and the general exchange rate at the time was around the 1.13 ish mark. Used my card to withdraw 70 Euro and the ATM was going to charge me almost £70, so effectively 1 for 1.
I obv declined it and my bank charged me something like £61, much more in line with the going rate.
Can see how people fall for it though; either just by shrugging and accepting the rate, or not realising they need to decline the ATM conversion rate (sometimes it isn't clear how to do this).
I'm going to Vegas in a little over 2 weeks and although I'm usually happy to withdraw money locally as I go, cash is king in Vegas and a lot of the ATMs charge up to $10 per withdrawal which is absurd. So I'll be changing my £ to $ before I leave, despite the rate being shite at the moment.
I do work for a travel agent though so I get staff rate in the bureau ;)