Aerial Topo at Night ?
The group of at least 17 drones have estimated wing spans of 6 feet (1.8 meters) and fly between 7 and 10 p.m., Phillips County Sheriff Thomas Elliott said.
I'd guess that one drone has been sighted 17 times rather than there being 17 drones. Lidar mapping would work as well after dark as it does during the day.
If they are flying legal there will be at least one waiver of record, probably several. The statement about flying all night would require tech that probably doesnt exist. It is more likely bigfoot chasers have adopted a new boogey-man to hunt..
Lidar and thermal work are in certain situations best done at night. Night permits are frequently issued, and some new rules are going to only make that a bit easier.
If they didn't file a night permit, then the will most likely get busted
Or they could be making crop circles 😉
Law enforcement have drones too, they fly 24/7.