I once had a irate business owner call me after I placed an order, demanding to know why their business name was in my e-mail address. After I explained it: "That's pretty clever."
When I was studying abroad, I lived in a temporary student dorm that was placed in an industrial district with a special permit from the government.
I tried to order a textbook online and my transaction got flagged as suspicious, so I had to call a support person, and he wasn't having it.
- foreign credit card
- address marked as non-residential area
- sketchy email-address using their company name
I also use my catch all to create unique "business" email addresses. The best encounter I had was giving my email address to retail person at a store and having them mistake me for an employee and give me the corporate discount. They asked me why I hadn't mentioned I worked for bigcompany@mydomain.
Its to the point now that unless the email address is @hotmail or @yahoo, almost everybody assumes that there is some company named domain.com that that said owner of the email works for that company.