So exactly how precise are these geofences going to be? Because I see it one of two ways. Either they'll be so small they're pointless, or they'll be too large and spill over into a neighboring property, at which point if your neighbors have personal no-fly zones, you can't fly a drone over your own property.

The problem is how many get them even when they've proven they're not top talent, and haven't done a job well.

About 5 minutes before someone pirates one.

Exactly.
I had to double check the page to make sure I hadn't clicked over to The Onion for a second.

Unless there were some sort of emulsification, the hydrocarbons would glob together and float to the surface. This is of course assuming the bacteria are being grown in some sort of aqueous environment.