“If your (Signal) group has more than 50 people in it, it's not a private space for communication,” EFF’s @evacide told @wired. Keep truly sensitive information to the smallest possible groups, or to one-on-one communications. https://www.wired.com/story/how-to-organize-safely-in-the-age-of-surveillance/
How to Organize Safely in the Age of Surveillance

From threat modeling to encrypted collaboration apps, we’ve collected experts’ tips and tools for safely and effectively building a group—even while being targeted and tracked by the powerful.

WIRED
@eff @delta
another ping to work on group messaging

@eff
Cool, so my gc with 49 people in it is safe

@wired

I wouldn't put even one person into a garbage collector.

CC: @[email protected] @[email protected]
I can think of several people who should be marked and swept

CC: @[email protected] @[email protected] @[email protected]

@eff two people could credibly have a private conversation. Once a group reaches a critical size*, the likelihood that one of them is a fed spikes to 100%.

*Three.