I've encountered several people who tried to do this... all of them were not as smart as they thought they were. I got 3 of the four to stop by saying "after we fire you I'll just have [the two smartest people they know] spend a month on your system do you think they'll figure it out"... they were like "yeah you're right" and became a lot more productive... the 4th we had to let go and it took about a month.