I think the use of the phrase 'virtue-signaller' should cause an automatic hammer to come out of the screen and smash the poster's keyboard - it's lazy, meaningless and getting very annoying.
On the other hand, it does tell the rest of us all we need to know about the impoverished intellect of the poster, so perhaps it is useful after all.
sunny-dave, Since it eliminates the requirement for lengthy explanations or for more personal and potentially hurtful criticism, I find the phrase communicates the message very well indeed. Short and to the point. Quite frankly your penchant for slinging insults is telling the rest of us all we need to know about your impoverished intellect.