What if my email provider, let's call it @MySuperAwesomeEmailProvider.com just goes out of business and decided to stop the service. Then I can't answer to the emails you will "life-ping" me with. And I won't even be able to change my email address on your system because I would have lost my account password. And then the next day, I don't think I would be able to go out.
Do you have a policy for how users can _prove_ that they are who they're claiming to be ?
Can you handle having _too_many_ users under the terms of that policy ?
The only proof we have is the email validation, but the service doesn't claim to actually be a will. It's more about emailing your friends or family one last time.
I don't understand the question about too many users, can you clarify?