My wife owns an email address in Gmail and you wouldn't think it was a very popular email address. Until of course someone's account information at numerous shopping sites began showing up. My wife contacted this person by phone and it turned out to be an elderly woman. The elderly woman was not having it and began arguing with my wife about whose email address it was. The elderly woman ranted on and on about HOW DAR…
A woman texted me via iMessage that she was calling out sick to her job at a local public school. I replied that I hoped she felt better, but clearly had a wrong number.
She insisted that I was Joanna, an Occupational Therapist at this school. (Emma gave me this number!). Clearly I was not, and did not know Emma, or any of the other things that were going on. Then she accused me of stealing Joanna's phone number.
Turns out -- if you send an iMessage to someone in your Contacts, it does the first lookup by email, NOT by phone number. By assuming Joanna had my email address -- something lots of people seem to think is theirs -- I ended up also getting their iMessages.