I mean, I've got nothing against crazy Mr. Johnsons, I just think taking a shot at someone (or doing what can, and should, certainly be seen as taking a shot at someone) is going to result in the negotiation turning into a gunfight, period.
But I like crazy Mr. Johnsons. The most popular Johnson I ever ran was modeled -- in universe, mind you, thanks to bio-sculpting, personafix chips for speech patterns, skillwires for body language, literally modeled -- on Christopher Walken.
For posting his dialogue, I'd type up a couple of perfectly reasonable sentences, just doing standard Johnson stuff, detailing the job, the pay, that sort of thing. Then I'd go back and remove all the punctuation, and re-insert periods, commas, exclamation points, question marks, and italicized/emphasized words completely at random.
No one ever tried to negotiate with him for higher pay, they just did what he said. It was awesome.