Just to make a few points clear here. I've got no interest in defending Wizzair as they are far from perfect and in the same league as Ryanair, but in this incident they where NOT at fault.
The Ukrainian CAA is a bunch of muppets I am afraid. There where only 2 Ukrainian PAX that refused to leave the aircaft, drunk as one would expect. They where removed and have made a nice fairy tale with blantant lies. However this sinks in well in Ukraine as one could expect police and SBU (Ex KGB) to behave in such a manner.
To make things more interesting. The owner of Ukrtatnafta is also a significant owner of Aeroshait and Dniproavia, competitors of Wizz.
Bribary, threats and other issues to hinder the Wizzair operation failing, this seems to be just another excuse and act in the game to force Wizzair out of the Ukrainian market that needs more competition and not the soviet style charade of a market economy.
Not surprising knowing how things are run in Ukraine, this is probably the beginning of great scam to deprive the PAX out of KBP with a economical alternative to the overpriced, grabage service providing Aeroshait, MAU and other 3rd world level operators that hail from this country.