Accusing others of "virtue signaling" is a much clearer example of "virtue signaling" in my opinion, since it's a particular population that tends to do it, and is used primarily to put down those they disagree with and mark them as belonging to a different group rather than to actually make any kind of meaningful point.
Virtue signalling is the conspicuous expression of moral
values done primarily with the intent of enhancing
standing within a social group.
I don't think Aaronson states his views on Trump with the hopes of increasing his social status. He does it because it's just what he feels and wants to express himself.I feel like I'm taking crazy pills here.
The whole value of the phrase 'virtue signalling' is that it accuses those you disagree with of inauthenticity. If I'm saying a thing I genuinely believe because I genuinely believe it, I'm not virtue signalling. It's only if the reason for saying the thing is to gain social approval that it's 'virtue signalling'. Any assumption that your opponent is doing something for this reason is uncharitable, and kills rational debate. It's essentially an ad hominem attack.
It's also ignoring the fairly detailed entry that Scott posted explaining in his own words why he started talking about Trump in his blog: http://www.scottaaronson.com/blog/?p=2777 when previously he'd avoided the subject.
Maybe it is virtue signalling, or maybe he really did feel as he claimed, that he had a moral responsibility to speak out against Trump. If you assume that it is only 'virtue signalling', you are cutting yourself off from engaging with his points.
Virtue signalling is usually done by people who sincerely believe the values they espouse - but they emphasize or show those values in order to gain or reinforce social status within the group. It usually is done by proclaiming things you hate, rather than things you like.
If the comment adds nothing besides an "I'm with you guys, that's the worst", it's fair to see and describe it as virtue signalling.
And yes, it happens on both sides of the aisle - heard lots of conservatives proclaiming their distaste for Obama over the last decade.
You know that was an interesting and useful concept before you guys decided to turn into yet another empty insult to fling at people.
But I'm welcome to roll my eyes at it.