Totally. Not quite the same, but someone in a meeting this morning kept talking way too much, interrupting, going off on tangents to talk about what she wanted etc. I was sitting there cringing thinking "If I can notice this stuff, what the hell is everyone else thinking??"
I think it's a control thing for me. This person was associated with me, and even though I can come across as weird socially, I'm still ultimately in control of what I'm doing. When she's making me look bad, I have nothing to control! I'd much rather say nothing than act like she was.