To be blunt: when I'm hiring for a developer and interview who worked for Facebook as an applicant I'm going to have a lot of questions about exactly what they

To be blunt: when I'm hiring for a developer and interview who worked for Facebook as an applicant I'm going to have a lot of questions about exactly what they worked on. There's no way a feature like this created by accident, the developers who put it together knew exactly what they were doing, and did it anyway.