Hah. I have a first initial + last name Gmail address. I occasionally get an email meant for somebody else, but one time I got an email about "plans for the wedding" and it was an itinerary for the bridal party etc. I had to respond to that one and be like "Hey you have the wrong email address"

I could have messed with them. Or shown up for the wedding or whatever, but I didn't want to ruin somebody's special day. It wasn't the fun thing to do, but it was the right thing to do.