I think you are conflating enforcing rules with arbitrary rules.
given that there are literally streets with it on[1] I doubt its a bannable offense. plus, you'd expect that to be filtered out at the very start. Plus if they adhere to their escalations then it wouldn't result in a ban.
Hopping onto your wider point, Facebook et al are cesspools because they _don't_ enforce the rules well enough. if you look at Facebook's code of conduct, its actually really good. Readable, simple & comprehensive. (go read it, i promise you its good.)
the problem is, its not being enforced evenly. Us mortals only get automoderated. Popular posts (5m+ views, I imagine) will get the overworked human treatment. Politicians will be given free reign, because of reasons that are not immediately obvious.
> If this sounds far-fetched you're probably exhibiting the near sighted "if I have nothing to hide I have nothing to fear" fallacious thinking (or coping mechanism).
I have lots to hide, and a boat load more to fear. Again you are mixing in issues here that should be separate. Yes, I as a singular citizen should be able to hold any opinion I wish. I should be allowed to speak about it. Should that be free from consequences? In all but clearly laid out cases, yes. Should I be able to force that opinion or content onto someone else? no.
In the US, you are more or less allowed to say what you like, but I, crucially don't have to agree, or indeed agree to broadcast your opinion(whether you like it or not, a forum is a broadcast by a third party).
I am crucially aware that _true_ freedom of speech has never existed. I do not like that single corporations are given such power to censor things at will without oversight, but that's just newspapers and TV. That's before we get onto "fighting words" and the like.
I want people to be able to say most things all of the time. The issue we have with online/text discourse is that its really simple to bully people without consequences. Society does not work if there are no consequences for actions that cause harm and injury.
Do I want to curtail freedom of speech? no. do I want china style censorship? no. Do I want a multiplicity of services to cater to the wide range of thought and speech? yes. Should everyone be forced to carry all opinions regardless of impact or outcome? no.
[1]https://goo.gl/maps/k2wVzDEBt4FUMY5b6