There are no laws against it in the US. In the EU there are some[0][1] now. [0]: https://www.acm.nl/en/publications/bookingcom-commits-adjusting-its-website-fo

There are no laws against it in the US. In the EU there are some[0][1] now. [0]: https://www.acm.nl/en/publications/bookingcom-commits-adjusting-its-website-following-action-european-consumer-authorities https://www.acm.nl/en/publications/bookingcom-commits-adjust... [1]: https://www.acm.nl/en/publications/booking-and-expedia-inform-consumers-more-clearly-about-their-offers-following-action-european-consumer-authorities https://www.acm.nl/en/publications/booking-and-expedia-infor...