Lol, I work with other contractors at big jobs all the time. It's amazing some of the Mcguyver crap people get away with. There are some times when I wanna just ask people what the hell they are thinking.Last week I watched one guy use actual gorilla glue on some some screws he stripped out installing hinges on a wood frame and door.
I see all kinds of horrible jobs when we get called out to fix another companies work when the customer can no longer get in touch with the original installer.
Pretty sad where some people's pride has gone.