"I think that the first time that someone gets busted as a result of such, where there was no probable cause, that the courts will strike down any convictions and therefore set a precedence that that ain't a proper use of the drone..."

The time for that kind of law is BEFORE they are used for domestic surveillance. You're buttering the bread on two sides, Bobert. Besides, when the laws are upheld the goal post will be moved and judges who are maybe a bit more under the "I'll trade liberty for security" umbrella will rule that that's the price of a 'safe society'.