[Sundae]

In answer to the OP, I think it's because we're basically a bunch of smart-arses.
When someone is so obviously taunting us, we simply can't resist the urge to say something back.

We know the mature thing to do is stay silent, but there are just too many things that pop into our heads and via our fingers onto the internet.
But if some of us weren't like that, the Cellar wouldn't be what it is.

Kudos to those that listen to the mature voice of course.
The silent majority.
Personally I like a bit of drama. And at least when it's from an outsider it means there's no long lasting consequences.
She'll run around showing her knickers for a while, we'll shout and stomp and then when it goes quiet we relax again.

It's just a shame she joined too late for secret santa. I would totally trust her to participate.