I did unknowingly. Back in 2000, in the AIM days. I had my sister's friend on my list, so I thought he knew who I was.

After a few weeks, he got a little flirty and I realized he didn't know who I was. I freaked out and I guess ghosted him.

My sister is still friends with him and I'm assuming he figured it out, but I'm too scared to ask. Lol