RE: Journalists using drones.
Not sure that a machine can commit any offence. If I take a picture of you as I walk past your house, can you prosecute my camera?
If my machine flies over your house and takes your picture ... where is the harm or loss?
You don't own the sky above your property ... so you don't have any exclusive right to its use, afaics.
Dunno about the US, but in the UK, trespass is not a criminal offence. You can't be arrested or prosecuted for trespass ... only for the damage that you cause. Most often, any such damage requires a civil remedy, rather than a criminal one.