It hasn't happened at all recently, as most of my social circle has long ago forsaken blogging for Facebook or Twitter, but yes. Looking back, I'm realizing that I've seen myself show up in other people's posts quite a lot over the years. However, the context varies, as does the tone.
I'm not even going to sit here and pretend I don't know why some people find me hard to stomach. I don't get up in people's faces or force them to listen to my critiques of who they are or what they're into. (If you approach me and ask though, it's another story.) I really do keep to myself for the most part, but people nevertheless can tell when I don't really return their interest in me or don't see them as being in the same league. I'm told it makes people feel dismissed, invisible, or otherwise unworthy of notice. Apparently that's much tougher to deal with than it would be if I were just... like... a hater. People can usually deal with being hated on, but they don't like being dismissed or ignored, so I've inadvertently made my enemies over the years.
Sometimes those enemies eventually decided they were going to let it all out in writing, usually someplace they know I'm likely to see it or eventually find out about it. They were too chickenshit to say what they wanted to say to my face and most never dared use my name, but it was nevertheless pretty obvious they were talking about me. I'm thinking of ex-friends mostly... and maybe a few acquaintances that wanted to be friends, but that I wasn't really interested in for whatever reason.