Early Reddit isn't what what most would call a "bad result". Ditto for early 4chan and for a lot of smaller communities that have very little restrictions on content beyond civility and anti-spamming.

The problem is that having uncensored speech doesn't scale, because eventually you'll become big enough to attract media scrutiny, which inevitably cherry-picks the worst parts of the user base. This cause 1) advertisers to pull out and 2) starts attracting more of the wrong type of users.

My point was, that it is hard and the lines are blurry.

But actually I do believe in the concept of unrestricted speech.

But I really don't know when was the last time, that was tried. There were times, when certain topics were ok to speak freely about, like racism, yes, but at those times other topics were restricted, so what exactly are you talking about?