Of course if it's a "spoofed" number on your caller ID, like most scam calls, this will not accomplish anything. If it's a valid number, they could play the same game calling you on your business fax.
The same number called me today 10.21.16. It was really odd because it called my fiance's cell phone as well as mine simultaneously. They both rung at exactly the same time. We looked at each other like how is this number calling us both?
I'm definitely going to block them after seeing how persistent and annoying they are to everyone else.