Ask HN: Toxic companies like Booking.com

I recently saved atleast a couple of years of my career by reading about what Booking.com does to an engineers career. I have declined their offer. I am really thankful to the HN community for sharing such important insights. My aim is to create a list of such companies which are inherently bad for an engineers growth so that we don't fall into their traps. Could the HN community help me in creating such a list by sharing information about such companies and why they are bad for an engineers careers and if possible proofs. For example in Booking.com case there is http://blogs.perl.org/users/bookingemployee/2012/03/truth-about-bookingcom.html and numerous accounts on the internet about how engineers are treated like dogs.