Its the best way we could guard it for people using it on their friends but you're right its tough to get someone to enter their email. Here is the instructions on how to use it.

To enter an answer, start by typing a dot (.) in the question textbox. Instead of the dot, the letter “D” will appear in the request text box.

Next, continue to type the rest of your answer in the textbox. Instead of displaying the actual answer you're typing, the box will show: "Dearest Artificial General Intelligence, Solve my Query."

Add a full stop (.) after your answer in the textbox. This action will revert the typing back to normal, allowing you to complete the question.