Several thoughts ....
1) Wow ...
2) Moron ...
3) Will probably try to make a warranty claim some day either to the OEM or the lube maker for some engine failure issue
4) I'd never want to have to work on a Smart-Car; talk about a cramped space
5) He probably needs to start his own website; Robertisnottheoildude ... (The anti-bob; the prince of dark oils, as it were)
6) Makes me wonder how he checks for obstructions in the barrel of his shotgun, or tests for live voltage in his panel box ...
7 Did I mention Moron?
Genearlly, over the life of his vehicle (say 150,000 mi) he may do this 30 or less times. I actually suspect it won't really harm much as the tribochemical barrier is still intact even with the oil gone, at least not to a point where he'd know the difference because he's probably not into UOAs, as it were.
But it's just not good "policy" and we all know it.