That is utter nonsense.

I don't even know where to begin. Technically, you can say whatever you want, but you cannot expect to avoid persecution (or prosecution) if you do.

And in most forums, you can't even say whatever you want. You'll be censored by the site hosting the forum, by the hosting company (for web sites), or ISPs.

You can begin wherever you like, but you aren't going anywhere. If it was nonsense, it wouldn't be happening non-stop on 4chan and lots of other places. The only people iirc who've gotten in trouble there are those who've confessed to actual crimes. For instance, the kid who broke into Sarah Palin's yahoo account, or the guy who stood in a box of burger king lettuce. It's easy to track people down, but simply doesn't happen (yet) for speech "violations".

Maybe you're in Canada or some more oppressive place though.

4chan has bans, and authorities are frequently called when illegal content is posted. Try again.

The saddest aspect of this kind of discussion to me is to see how people argue in favor of their own oppression.

People seem to be increasingly conditioned by fear, and increasingly cowardly. What happened to sentiments like "Live free or die!" ?

Selected out

Try openly writing about your plans of assassinating some high-level official. You won't last a day.