Booking.com sent me to kayak.com to book airline flights. And everyone in here says it's safe, so I'm using them and allowing them in uMatrix.
I use Booking.com all the time to book hotels.
Never had a problem.
I use AutoMapper and Visual Studio pointed me to this site. So I guess it's ok.
I allowed script on this site.
Email from firstname.lastname@example.org saying they hijacked my account. This time they didn't try to spoof my email.
kinoi.jp might be legitimate and this guy just spoofed their domain. But I gave them a low rating because of this email.
Website is fine.
I like the airline, except for the scramble to get a seat. ;)