They have outlined in dev diaries they aim to make the elements as realistic as possible i.e even the most careless shipbuilder would have to follow some principles of logic.
Seeing as ships will take some time to build atleast smaller aircraft and vehicles will probably mostly be of sleek design because of thriftiness. It would take considerable more resources to turn a one-man aircraft from a sleek design into a penis, for example. Very inefficient.
Who knows what organizations of childish people and crafty teenagers will come up with though.
