Hmmmmm....
one of my patients is a ntl installer for business BB. He knows nothing more about broadband than how to install it. If he is asked any questions (eg networking/wireless etc) outside that narrow knowledgebase he is stumped. He is very embarrassed about this state of affairs and would be happy to receive training from ntl but they don't have any to offer. I suggested that he browse this site and it's knowledgebase to learn more but he doesn't actually have BB at home as he is as poor as a church mouse.
............btw, before anyone asks how he can afford chiropractic fees, I often treat him for free/a bottle of wine.