I actually got a call from a company I bought something from, direct from their website. I had bought it using the email $company@$mydomain. Got a call (in the days before most of my calls were not spam and I answered the phone!) from a marketing person and the guy tried to bully me into ... not sure what. I couldn't even tell, like you, what he was accusing me of... I'll say, it felt really good to school him about the internet and how it worked.