Great point! We integrated the QR-code and link based sharing into the app to provide a seamless experience for users.

However, we also have an email sharing solution already integrated into the app which uses public-key cryptography. This is protected from accidental leaks as you correctly pointed out.

Thanks for the feedback, we would update our WhitePaper with the details from above, and also indicate that to users in the UI - so that it scares people less! ;)