Info about MiG's escort NOT verified — there are no any photos/videos at this moment which shows MiG-29 side-by-side with Ryanair's plane.
Additionally there is an alleged video of the Mig landing after escort with 6 air-to-air missiles visible
(Based on the passenger numbers, assuming 3+3 seating, and assuming everyone has, on average, one smartphone with a camera).
Not to mention that Air to Air missiles have a range in the tens of kilometers and the MIG-29 has sensors to observe the aircraft up to 100 km away.
I don't think any of the passengers would have been aware in the slightest if the MIGs where flying 5 km behind the passenger aircraft.
https://www.faa.gov/news/safety_briefing/2015/media/intercep...
Of course, they could also intercept from a bigger distance or threaten the plane with surface to air missiles and no jets at all.
Intercepting from a bigger distance has the downside that the pilot cannot see the fighters except on electronic displays, all of which have zero security (just like the radio used to communicate with ATC). I wonder how long until someone "intercepts" an aircraft with an SDR and a directional antenna.
Source?