Bitcoin isn't illegal in US, theymos is a US national & is running this forum from US soil. That's what counts, legally.
If that's the case, that US law is the criterion for what can and can't be discussed, then:
1) I'm going to shit a brick
2) Someone should add that to the official rules
I'm not supporting ponzi's or supporting the people who support them. But I do think it's a fair point that the laws of any country are sorta arbitrary and as far as I can tell, it's the rules of the forum as established by the forum dictators which govern what's discussed here and what's not. I think the point that bitcoin itself is illegal in some places puts a fine point on that.