I'd turn it around on them and blacklist anyone using their internet service, forcing thousands of people to change providers.
Or put in a new clause, charging anyone who uses sbc an extra 10 cents per song, to cover the fee sbc is charging, and to cover the manpower it took to set up the extra fee, with a big bold disclaimer that this only effects sbc customers, and that if you changed your isp you would not have to pay that fee.