Remember those old animated singalongs?

For a nanosecond, Phil, I thought your post might be about 'behavior enforcement' in spaceport bars... >grin<

The *real* topic of your post sounds like a great idea... with one possible drawback: low spots. Crater bottoms, canyons... like that. Targeting drop zones is going to be an interesting exercise, but if these things can be duplicated cheaply, there's no reason not to drop a whole bunch of them all over the planet.

Let's just hope that it's not true that "a rolling probe gathers no data".

And - re Justin's Heinlein deprivation: I'll bet that, even if those classics of our youth aren't currently in print, they can be still be found in the Young Adult section of libraries - which is where I found them forty years ago.

E' (_Red Planet_ was one of my favorites!)