As admin you are responsible for the content of your forums, you will then naturally have to remove such posts. If we see one or two, fairly recent, posts with illegal content we'd not suspend, but if we see several, or old posts, with illegal content we might suspend your account.
In the end it all boils down to you needing to monitor and moderate your forum in timely manner to avoid getting suspended for something someone else posts in your forum.
If you activate and use a chat function in your forum it will eventually get suspended, if for nothing else so for high resource usage.
how hackers do it tutorials with the intent to tech others how to protect them selves is allowed, but if they can be used to perform hacking as well, they are at best in a gray area. Such tutorials can not contain information that would help someone hack a site.