"Do you know of any businesses which has actually been blocked by VISA/MasterCard over this?"
Do you know of any people who didn't hand over their wallet when someone held a gun to their head?
The payment processors hold a disgusting amount of power here, and most of their targets are far too small to fight back.
We can't rely on companies or websites to fix this shit because they'll be shut down as soon as they try. This is something the people need to fix.