If the thought exists, its possible. Sort of like how someone once thought of a flying object that can take you from point A to point B. Grow up, its business, and I myself have experienced this with SEVERAL registrars and was just talking about this with my business partner earlier today because it happened to us when trying to register a name AS WE WERE TYPING IN OUR CREDIT CARD INFORMATION TO ACQUIRE AN AVAILABLE NAME...
If a domain is not registered, and hasn't been for years, and you're on the checkout screen, and its suddenly taken by the registrar or its affiliates, then guess what? Once again, grow up. It's business.
Too bad 99% of anyone involved in tech companies aren't man enough to meet in a parking lot for a swift uppercut to the chin to be taught a lesson.