If you don't want to hear about it then go somewhere else.
Isn't every negative reception in some way pre-emptive? Clearly a single post that's off topic is easy to just ignore, but if no negative incentive is given, the number of off-topic posts will increase, and if this continues, eventually "go[ing] somewhere else" would be like having to watch your feet at all times to make sure you don't step on something sharp. It would be too distracting, and would detract heavily from the value of the forum.
The slippery slope argument rarely generalizes. Stuart is one of the most prolific contributors to this community, with one of the highest karma scores. Do you think he doesn't know what's appropriate? If Eliezer posted his baby pictures, would the complaints be as loud?
This is a community of rationalists. I hope they'd be discerning enough to know when a reprimand is needed, and when it is not.
I've always been more of a theoretician, but it's important to try one's hand at practical problems from time to time. In that vein, I've decided to try three simultaneous experiments on major Less Wrong themes. I will aim to acquire something to protect, I will practice training a seed intelligence, and I will become more familiar with many consequences of evolutionary psychology.
In the spirit of efficiency I'll combine all these experiments into one:
She's never seen Star Wars or Doctor Who.
She's never seen David Attenborough or read J. L. Borges.
She's never had a philosophical debate.
She's never been skiing.
Never had sex, never been hugged or even been licked by a dog!
She has so much to look forwards to...
(Though she'll be very boring for several months yet!)