One of the leading investigators of online disinformation behaviours, Kate Starbird of UW, started looking at ad hoc informational networks (largely though not wholly ham radio) springing up around natural disasters, while at the University of Colorado. Disinformation was a concern but not nearly so much as it's been in the online world, for interesting (and not fully understood) reasons.

Licensing, volunteer organisations, training, and extant community among hams likely plays a strong role.