yeah it sounds like since A has my data let me share a public document with everyone else as well since one already has it so whats the point right?
If you really care about this you need to take steps and should have disconnected IDs so you as a persona cannot be tagged to all the data you have out there.
Anyways I am not here to debate with you about why I should/shouldn't use a particular app, to each his own. I just shared the information that you don't really need an app for this and the same can be done with a simple SMS.
