But in my opinion, there is no such thing as absolute freedom of speech in public places (like this forum) because your freedom sometimes will violate someone else's rights.
It's a bit hard to violate someone elses rights with speech only.. People don't have the right to not be offended, or the right to be provided a safe space where they won't encounter controversial or politically incorrect ideas..
Freedom of speech should come with freedom to hear (or not) otherwise it'd just degrade to useless noise drowning out anything of value. Creating garbage speech is typically much easier than something worth hearing so a single asshole can flood the whole board with nonsense. We do have some tools to that effect (Ignore) but unfortunately they don't work when the forum favors 50-account trolls.
I understand that this board can't maintain absolute free speech..
Perhaps we should do it the Bitcoin way and charge a TX fee for each post 
That would be an interesting dynamic to try somewhere.. It is proven quite effective at reducing spam..
Reminds me of..
"But you must understand, young hobbit. It takes a long time to say anything in old Entish, and we never say anything unless it is worth taking a long time to say."