The reported missing radioactive material is fucking part of a PET scanner, not exactly something dangerous like you're being lied to about, and likely has nothing to do with the drone sightings. Technically radioactive, but not dangerously so, and certainly not something that would be detected by an aerial drone. (0.267 mCI is less radiation than you receive getting an xray)
Every single post is people making shit up, nothing has been confirmed.
There's nothing to suggest all the drone sightings are linked, there's nothing to suggest the drones are working together . People are just seeing drones and now more people are looking and seeing more drones.