John J.
Senior Member.
One interesting claim that could be checked is that it has been happening "every night with the exception of Thanksgiving".
If some of the reports are of drones (I think it's likely many are misidentifications of commercial aircraft as per Katie Corrado,
see Katie Corrado Misidentifying Planes as Drones, over New Jersey thread), I'm tempted to offer an explanation about the Thanksgiving lacuna:
1. The drones are being flown by American people, mainly for their own fun, like most other instances of drones being flown in the USA. Maybe some are getting a bit more fun out of it by flying at a time when for some reason it's newsworthy.
2. The drone users are, on average, very similar to Americans who don't have drones. They are not flying the drones for any nefarious or treasonous purpose.
3. So most drone users lucky enough to be able to get together with family and have a nice meal on Thanksgiving did so.
4. Similarly, some of the more impressionable potential witnesses were safely at home enjoying a bit of turkey.