I disagree with you 100%. For our company to succeed we need people who want to be with us, no matter what shiny new offer comes their way. That's the point.
Retaining great people is something you earn. You don't earn it by daring you hope others attempt to poach your employees to test their devotion. You're a startup, not a religion.
Other firms attempting to recruit your people is a sign you've hired good people. Also, a sense that employees have a choice of where to work, and you'll do the best you can to make your company a great place to work is also good.
I think tone matters in blogs like these, and I think the HN community appreciates the positive portrayal of things over bravado. Maybe your original post flowed naturally to you. If so that is ok, but I think you would have had more success with the post had it been more observational instead of confrontational. To each his own.
Best of luck with fab, it is a great company/site.