They ain’t laughing with you, Sparky.
Gibbs. Boychik. When she did it, it was funny.
A quick response and a clever counter-taunt to the sexual attacks made on her by your side’s cheer-leading squad. Makes it clear that said attacks will not be taken seriously without a word even being spoken. The Netroots hate not being taken seriously, so that works.
But when you (belatedly) do it?
You just look like a dweeb. One who can’t even write your own material.