You can trust that the service will persist. The fediverse is practically speaking unkillable since no one group holds all the strings. The trade off is that any data you post is shared freely with all. At least it’s clear from the start and no one is profiting off of it. Unlike Reddit, you know exactly what’s going on as soon as you sign up.
Google is forcing apps to have Google services handle private keys. VLC doesn’t think that’s a good policy for security (it’s not), so they’re refusing to adopt it. Whenever you sign in on an app with your fingerprint, the encryption/authentication is being handled by a different program and stored alongside all your other keys. This creates a single point of failure for all sign-ons on your phone.
Blowing smoke directly into your friend’s sensor to ge them in trouble.
Or ya know, vaping in the hall where you don’t have your own personal sensor and you’ll be back in class by the time any sensor goes off.