An observation various experts have made is that this is part of the so-called hybrid types of measures for which Russia has a large tool kit it uses. In the context of these measures, they have done things that can inflict psychological pressure on populations and governments. It's part of the destabilization efforts, which take many forms. This overflying of airports, for example, is disruptive, but it also destabilizes a government's response and understanding of what's going on.
