The 1st amendment is very important however it doesn't contradict the fact that these forums are "well-known breeding grounds for radicalism and extremism". Se

The 1st amendment is very important however it doesn't contradict the fact that these forums are "well-known breeding grounds for radicalism and extremism". Second, since those sites are many times being DDoS or going offline, they also have a mirror on the darkweb (TOR & ZeroNet). Third, as the article states, there are many other forums on the darkweb that exploit the anonymity to incite and share violent propaganda.