A few reasons:
1. They'd need some method of identifying the page to the user so it was obviously not generic and the user could determine that. Probably the best way would be to use the phone number as a key.
2. They'd need to stop bots from scraping the pages and tracking people by watching the pages pop up.
3. They would need to consider these issues and understand that the public is not made of children.
4. They'd need to invest some time in thinking of and creating a good system.
5. They'd need to consider the point of this endeavor rather than just jumping to the first idea someone had.
Biting the hand that feeds IT
