My buddy did that.
I got a gig as a contractor for a well known company. They were hiring and he told his recruiter to get him in. After several conversations trying to tell him not to come in and telling him what a clown show it was, he still managed to get hired.
Same thing. Came in, continually had to ask me how to do stuff, and I kept telling him, "See man, I told you this place is a clown show!". He did the same thing. Left his laptop, "Going to lunch, be back in an hour."
Never came back.
Yeah I cant blame someone for knowing their limits. In this case none of the people who worked with the person ever knew why they never came back.