Yeah man. It wasn't someone stalking ME, but a girl I went to HS with, who I'd shared a story about on here back in my first couple years on TA. The person contacted me via pm through an account they'd obviously made just to contact me, and it was quite a few years after I'd shared that story on here. He (or she?) would have had to do a lot of digging to put the pieces of that story together and figure out who I was talking about.
So yeah I changed my user name for the first time after that.