A personal website in this regard is very different then a discussion board, as the latter serves a similar purpose of allowing discourse.

LW exist for allowing discourse to refine the art of rationality. It's purpose is not that everybody can share whatever is on his mind.

Editorial and moderation choices are going to be directed by that goal. It's different than a medium like facebook that exist for everybody to share anything.

"The Iranian people have the right to free speech - just not within the country". Even though it's technically true

I doubt that's technically true. The Iranian government is going to punish speech by it's citizens that it doesn't like regardles whether that speech happens in Iran or whether it happens in another country.