What is it about Elon Musk's companies constantly suing people? Tesla sued Top Gear for libel. SpaceX sued a safety consultant asking clarification about a rumor [1]. Now this tiff may well end in a lawsuit.
So how many lawsuits is that? 1 for SpaceX and 1 for Tesla...
The SpaceX lawsuit seems justified, since it was basically extortion, as a thinly veiled consulting offer. SpaceX have real astronauts, with real experience, to advise them. This includes retired astronaut & shuttle commander Mark Kelly.
Yeah, it's a bad article, but the best I could find. The article is slanted because the it only contains quotes from SpaceX, so you hear only one side of the story, with nothing from the defense. The case was settled.
[1] http://www.theregister.co.uk/2011/06/20/spacex_sues_consulta...