Let's say an online service makes an unpopular business decision, and people are coming up with ways to protest the change. If I tell someone to download LOIC (a network stress testing tool that is often used in denial-of-service attacks) and DDoS (distributed denial-of-service) the company's website, and someone actually does, then I would likely end up in hot water because DDOS attacks are very illegal.
But suppose I said something like this instead: "Protest however you want to. Just don't download LOIC and DDoS the company's website, because that's illegal. Which is unfortunate because a DDoS would send a very strong message."
And let's say someone or some people decide to participate in a DDoS attack because they saw my message. Would I still get in trouble in this scenario?
I do know some businesses sold "grapes bricks" during Prohibition and provided information on how not to make wine. To my knowledge, no one was ever convicted for doing this. However, that was a hundred years ago, so it wouldn't surprise me if relevant laws have changed since then.