That’s really the killer for survivalist mesh ideas. It’s trivially easy to jam, and if it’s open it’s also easy to DDOS.

Jamming is done in military scenarios too, but in that case it’s limited by the fact that a jammer is a big transmitter painting itself with a big sign that says “fire missile here.” Civilian mesh doesn’t have that fallback.

Neglect is a bigger killer than active denial. If the Internet goes down it will likely be because a few execs decided to replace competent network admins with AI, or because all the competent network admins decided to quiet-quit because they aren't being paid jack compared to the folks hawking AI vaporware.

Battlestar Galactica opened my eyes to this problem more than electronic warfare in games of the day did. It's freaky (read: terrifying) that we're getting to a point that people are starting to take "embedded information (and decision)" systems serious enough to deploy them into meat space.