I'm a bit surprise that a well-known company publicly assume to crawler and workaround bot protection solutions.
Crawling is against Booking CGU :
"Our Trip Service is made available for personal and non-commercial use only. Therefore, you are not allowed to re-sell, deep-link, use, copy, monitor (e.g. spider, scrape), display, download or reproduce any content or information, software, reservations, tickets, products or services available on our Platform for any commercial or competitive activity or purpose."
Crawling is against Booking CGU : "Our Trip Service is made available for personal and non-commercial use only. Therefore, you are not allowed to re-sell, deep-link, use, copy, monitor (e.g. spider, scrape), display, download or reproduce any content or information, software, reservations, tickets, products or services available on our Platform for any commercial or competitive activity or purpose."