and free speech doesn't exist on private internet forums.
I see this a lot, but this is a misleading statement. We do in fact have the same free-speech protection on internet forums that the first amendment ensures. That is, we will not be charged by our goverment with a crime for what we say/type, just as we are protected in "real life".
Why people get confused and think that not having the right to post on any message board without being banned/having a post deleted/whatever means that the first amendment protections don't exist in a private place always confuses me.