Most people will see this as unfair and it will distort economic measurement by doing alway with price signals. I would think the blowback will be about the abuse that can (likely will) happen.

"I see based on your social media posts you have a family member in hospice. Now you're buying a airline ticket to their city. You must really want to see them so I'm guessing you'll pay a 100% markup..."

Yep.

Personally, I think that surveillance pricing is inherently abusive.

100% Should be illegal at a federal level