This is also such a delicious example of the Streisand effect...
I was going to say precisely that. In the end, banning Roko's post was pointless and ineffectual: anyone with internet access can learn about the "dangerous" idea. Furthermore, it's still being debated here, in a LessWrong thread. Is any of you having nightmares yet?
On the other hand, does not banning these debates contribute to having less of them? Doesn't seem so. We already had a dozen of them, and we are going to have more, and more, and more...
I can't know what happened in the parallel Everett branch where Eliezer didn't delete that comment... but I wouldn't be too surprised if the exposure of the basilisk was pretty much the same -- without the complaining about censorship, but perhaps with more of "this is what people on LW actually believe, here is the link to prove it".
I think this topic is debated ...
WARNING: Memetic hazard.
http://www.slate.com/articles/technology/bitwise/2014/07/roko_s_basilisk_the_most_terrifying_thought_experiment_of_all_time.html?wpisrc=obnetwork
Is there anything we should do?