Periodic reminder (though most already know or won't hear): privacy is an illusion. There are no major communication platforms that won't ever be recorded, tapped, or covertly monitored.
The geekier among us can probably get close, but we won't bother because we know how big a hassle it is.
Fortunately, the _VAST_ majority of "private" messages are extremely low-value, and not worth the effort for a government/corporation/crook/voyeuristic-admin to deal with, EVEN if they have access.