Here are some of the questions you might have on using Superhero Power especially on the Sandbox.

What if someone else grab my registration card?

First as a Superhero you will need to act fast and should report it.

Secondly it does not really matter much since it is not activated. Even if it is activated, it is authorised to his/her own boards and not yours.

Once activated under your name, any attempt to assign a different person will fail.

Can someone use my card to launch services?

No, the system will check that the person who use your card browse library and to run any module will fail unless the member id matches that of activated member who is the rightful owner of the card.

Can someone remove me from the card and assign themselves to it?

Once the launch card has been activated, the system will not allow for other member remove you and assign themselves as card member. Even if, the attempt is successful, it will fail at the backend when the ownership is checked before running critical parts of the system.

Will people get to know my personal information on the registry?

The data in the registry in a private, no membership board protected by Trello native security implementation for private board.

Can I remove my Avatar or change my nickname for better privacy?

After the card is activated, both of these information will not be required.