There is nothing in my contract that prohibits me discussing Netjets Transportes Aereos, the Portuguese fractional company, in a public forum. A few points: you don't just file a flight plan and fly away from Moscow to the nearest civilised place, which btw is Helsinki, about two block hours away. You need to get a permission to do that, and obviously this crew had arrived outside the working hours of the visa office, which means that they were there also outside the office hours of the permit issuers.
Possibly they also were out of duty hours, certainly the pilots would have been in the morning had they stayed at the airport holding the hand of the maiden in distress. Possibly had a flight to do in the morning, this was the only way to get the job done.
Moscow is a major crime city, so is London or Paris. But the transit area of any Moscow airport is not a major crime area. Not comfortable, but with some assistance from the handler should be relatively safe and quiet.