Right now there are a lot of new eyes on Signal, and not all of them are familiar with secure messaging and its nuances. Which means there’s misinfo flying around that might drive people away from Signal and private communications. 1/

Bond, Grand Nagus Bond

I would add that most of this also applies to other situations like:
* International travel especially into the US.
* Conventions, festivals or theme parks especially if they have a high tech/hacker contingent
* Some of these should be considered even of just heading to a bar.