Ripple is a "panic button" that can send it's trigger message to any app that is
a "panic responder". Such apps can do things like lock, disguise themselves,
delete private data, send an emergency message, and more. It is meant for
situations where there is time to react, but where users need to be sure it is
not mistakenly set off.

Here are two example scenarios:

* An organization gets regularly raided by the security forces, who search all of the computers and mobile devices on the premises.