Using "This" is cliché and redundant, where as quoting with no response is better.
Quoting with no response is annoying to me. It's like you were going to respond to something but forgot to write anything yourself. Using "this" is just saying you agree with what you quoted. I find it to be a convenient shorthand.
oh and just to have something on topic: FC2 sucks!!
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." -- Bertrand Russell (I think...)