I typed in facebooks.com this morning by accident. Got a dead page. So I looked to see if it was registered and sure enough it was. I’m completely amazed they aren’t 301 redirecting the typos that they own for user experience and other purposes!
Registrant:
Facebook, Inc
156 University Ave, 3rd Floor
Palo Alto, CA 94301
US
Domain name: FACEBOOKS.COM
There must be a reason. Seems too obvious for there not to be a redirect here. Why then? My first guess would be to enforce branding and the second, legal.