Couldn't agree more.
Extend that principal to the thumbs UP as well, and we'll really be cooking with gas. If you agree with someone, or you like the jib of their post, then quote it and say something. Or if there's really nothing to add, then just nod sagely to yourself in quiet approval and move on.
I dunno why we have to collect all these thumbings. A notification of a thumb is always a bit of a letdown. I much prefer a quote, even if its someone calling me a dickhead.
Ya Facking Dickhead.