Amazon just told me to log into someone else's account. Huh, it's not just me (according to the HN thread about this.) I too have a common gmail account (I don't use it much but it's good to have just in case) and it gets bombarded by dumbasses who apparently don't know their own email address. I had someone do the exact same thing, sign up their Kindle and I got notified of every app they bought (all of the free ones from what I could tell.)

I've also gotten people signing up for hotel reservations, someone bought pairs of pants at Macy's and sent the receipt to me, a ton of job site signups from someone in North Carolina, and my favorite - signing up for car insurance. I ended up calling the insurance company and tried to tell them they had the wrong email but there was no procedure they could follow, they just had no idea what to do about it. Turns out the person also gave them the wrong physical address because I got a notification that their paper documents had been returned.