And then on Wednesday they made the attempt.
Comments like yours are predicated on this idea that speech itself can only ever be merely "irresponsible". But... the world isn't like that. If you spend years making "jokes" about insurrection, you eventually find someone attacking congress.
[1] Edit to answer the question below: you are falsely equating harmless anarchic geeks of the 80's and 90's with violent terrorists. It's not appropriate to manage these communities using the same tools.