Earlier quoted context omitted.
Compare them to underground dentists - Bob has no medical training, but has a dremel and practiced on a pig head. He offers to do a filling for his pal. He makes a bit of a botch of it, but he larns from his mistake and carries on. Dentistry is important so it's admirable that Bob ignores the criticism. Bob's first pal is currently fighting off a severe infection, but Bob uses that as a learning experience. Bob will…
If a growing portion of the dentistry industry was discovered to have been weakening people's teeth at the government's request, I'd start to buy Bob a beer a little more often.
It turns out Bob was actually receiving radio transmissions from the ADA through his fillings. He's a sleeper in the underground dentist community, waiting for the call to turn his xray machine on when the TSA releases its ruling on the need for back-scatter surveillance to prevent the next tooth-bomber from hijacking civilian aircraft. Be careful what you say around Bob.