Putting politics aside, there is no joking when it comes to aviation safety.
Basically, those countries and airline companies, which have been affected by the European Union’s recent ban, have two options to cope with the decision. The first option is to fully comply with the applicable safety standards.
The second option applies only if they can not comply with the required safety measures.

Since the European Union's ban affects the usage of the airspace, what about reaching various European airports without using the airspace? The European ban affects flying only. The non-complying airlines can still taxi in Europe, of course without flying. They could construct long runways and taxiways connecting their airports with the European airports.

Using airplanes as large buses is definitely a non-economic means of transportation, but it might be a good way to grow feathers the right way.