Wisconsin sales tax which can’t be controlled.
Now, taxing downloads and digital purchases. not only is this a -very- hard action to try and perform. The only people you’re realistically going to screw over is American companies which are currently selling digital media. If I paypal my songs from some Russian server run by the mob over in Moscow. they sure as hell are not going to pay Wisconsin 5.5 percent sales tax? This is almost as ridiculous of a tax as congress wanting to pass the 1 cent e-mail tax.