On the flipside I sometimes get mails intended for someone else with my name in Australia, but that is easy enough to assume that his friends/kids' teachers/etc. just manually typed in the address and messed it up.
I respond saying the shop has the wrong email address. The shop owner (let's call him Bob) replies saying "that's the one you gave me" facepalm #1
I find the car owner and forward him the info on facebook. He responds back saying "Thanks, Bob." Even though the message is clearly from me. facepalm #2
Even if these people were completely tech illiterate... have they never heard of a wrong number?!?
He emailed back as if I were a student. I responded pointing out that I had no association with the school. He emailed back asking me to explain further, as there was someone with my name at the school. So I explained that I thought it was probably someone with the same name. At least that ended it.