Scott Sheriff,
The situations you're listing off don't compare well to Walter's situation.
In his situation, he is the employer and the freelancer is the 'employee.' They want to avoid competing over common clients.
In the situations you listed, you made Walter the client - the client of his plumber, his mechanic, his carpenter, his barber, his electrician. He's the CLIENT is all of those, so your examples aren't applicable.
The resume example you provided is more along the lines of what he was talking about though. And I'm
assuming Walter would have no problem with his freelancers sending out resumes as long as they weren't going to his clients.
...just saying
Rob Grauert, Jr.
http://www.robgrauert.com
command-r.tumblr.com