"Fuck off!"- The typical Vogon greeting.
Vogons were an extremely unpleasant species that went around destroying planets. Hired by the Galactic government to do so, they took to the task with relish as the salary was good, the prospects were great, resistance was useless and promotion looked good on the job.
Vogon ships were not very nice to look at. In fact, to see anything uglier than a Vogon ship one would have to go inside and see a Vogon. They are savage, simple-minded brutes. Their brains are in fact badly deformed livers, evolution gone wrong as the result of excessive drinking. Vogons love killing half their own crew for fun. Vogons burn books. Vogons love destroying planets. Vogons never have the patience for evolution, fun, or anything. Vogons love capturing hitchhikers, and torturing them with their poetry, the third worst in the Universe.And all through this we're expected to believe Vogons "are not evil?" Suckers.