The drones over New Jersey are likely not dangerous, as federal analysis indicates many sightings are lawful manned aircraft, not unauthorized drones. However, the government should implement precautions such as no-fly zones over sensitive areas to mitigate potential threats, given the public's concern and the uncertainty surrounding the sightings.
Pres. Trump is right; these drones, which are flying over sensitive sites, could be foreign adversaries conducting espionage or sabotage. If Iran or China are involved, as some have suggested, these drones should be shot down immediately so the government can inspect them. The government should not be so careless when it comes to protecting US airspace.
There is no reason for military-grade drones to be flying around at night unless they're looking for something or someone. Potential reasons for these drones include searching for gas leaks or radioactive material, which has occurred before in recent years. If this is the case, it's not a big deal, and the government should come clean so people can stop worrying.