I have the same problem. I have a gmail account that is first initial + middle initial + last name. So if I were John Larry Doe it would be [email protected]. There's not a week that goes by without me getting email that is meant for someone else.

Receipts from purchases, I get signed up on email lists (why don't more require you to confirm your email?!?), and quite a few personal emails, such as invitations to birthday parties, etc. Every now and then I'll get something that is rather sensitive, like confidential legal or business documents.

I haven't had anyone angry at me, and most of the time I simply reply and tell the person that they have the wrong email address. I just really hate the lists I get signed up on.

I have tracked down a few people through Facebook because they bought a digital item that was delivered through email.