Charge extra (Score 1)

We code to standards, however we identify which browsers the site will be tested in and will be targeted upfront. When clients request specifically for IE6 we then quote them how much it will cost to make the necessary changes. You can "drop" support by clearly identifying which browser you will test in and support and then leave it up to the client to pay for the additional work that it requires to support a browser that most people won't or don't want to support.