Will the community be better off without a place to discuss behavior?
There weren't that many who really benefited from these forums, were there? Surely, though, there were. Some perhaps merely looked at others, some must have used the search function... some actually asked for and listened to criticism. Some (yours truly) asked questions about behavior, researched what Riot made public, read the ToS and Summoner's Code repeatedly and correlated cases akin to a lawyer.
Most people will surely be fine without something like this forum to offer guidance. One thing I fear may fade, is the biggest advice anyone can easily find through the forums that isn't so common knowledge otherwise:
Just don't chat with anyone you don't like. Use the /mute
I have a lot of other things to say about that, but must admit this is the most important thing that must survive this forum. If nothing else, this should be it. Is this what all these threads should amount to?