If your goal though is to see how far you can push the law, then it sounds like someone would need a lawyer? I am not one, nor do I have money I want to pay to one to find out. Why does it matter where the exact line could theoretically be drawn, if it's so dangerous to even approach it? Like child porn or piracy - even if merely sharing links to such rather than the reality of such directly, sites get taken down all the time, and then those sites aren't useful for anything at all.

I get that you are trying to do some kind of morality crusade about the rightness of the cause of whatever, but nobody knows what the USA is going to look like in the next month, 3 months, 6 months, or a year. The DOJ (Department of Justice) may be removed entirely, along with several other departments in the government, and what will then take its place?! Even if that were not true though, the DOJ could ask Discuss.Online for the IP addresses of everyone who interacts with this server. With names and identities revealed, anyone who has commented on this post may be investigated. Why risk that? And totally aside from any consequences to users, what if some agency had to ask jgrim and lazyguru for such records every single time a post like this happened - or even anytime someone responded, or even voted? It could be a huge nuisance even just to comply. Or not, what do I know, but I didn't sign on to make another, better, more friendly 4chan, or to come anywhere within a mile (or kilometer, whatever) of something even remotely illegal.

And telling people that murder is okay - regardless of the rightness or wrongness of such (e.g. even if not serious but merely to lay off some steam) - seems to fall into that category?

You say it's definitely not 4chan, but it sounds an awfully lot like 4chan, or if you meant to make it better than that, the difference hasn't been made clear, nor how much effort it would take to achieve, nor do I see anyone volunteering to do that effort either. (Edit: and to be clear, I'm not volunteering for such either.)