We had a guy coming into every meeting demanding we produced some low-level internal document for him. We tried to explain to him that (A) our project was not related to his project and (B) we were not comfortable giving anyone an internal implementation document of something that was highly agile.

So this went on for a year and by then the managers were really pissed off that we didn't have the "proper documentation" in place. We spent the next year creating a stable internal API and writing the documents he wanted.

What I learned from all this was that the only way to fix a -10x guy is to fire him. Because despite all this we spent the third year defending internal design decisions from a guy who wasn't even part of the team. In the end he was fired for failing to deliver in his own project - by which time our productivity doubled.