If it's really essential to the primary functionality of the site, then code it as part of the primary functionality of the site and you will be following the l

If it's really essential to the primary functionality of the site, then code it as part of the primary functionality of the site and you will be following the law. If you need to run usability experiments, you will need explicitly consenting participants. Things will be harder to do. You will probably have to invent some clever new ways to do things that used to be trivial. And yes, users may lose out on some stuff, but they are probably willing to make the sacrifice. As usual, it's the consumer's job to tell you what they want and it's the business's job to figure out how to give it to them. But instead of voting with their dollar, they are voting with their vote.