From your own article, this guy did it and didnt do jail time, it was a civil property destruction case. http://gizmodo.com/this-guys-neighbor-will-pay-for-shooting-down-his-drone-1714496464
The FAA says that it would be a civil property destruction case
From your own article. The issue comes in when it is being used for commercial use, which the FAA has said they will regulate.
Again from your article, guy shoots down drone, no federal charges, only charges over the firearm use
There is literally NOTHING to back up that taking out a hobby, non-commercial drone, will get you federal charges, other than you saying so.