So, how about those Mets?
I also run a busy board (completely different genre) and if there's one thing to come away from it all is that you cannot please everyone.
There are the serious types who just don't get the Internet, and those who do (fortunately the majority).
There are the lurkers who read, process, learn, and post infrequently.
There are semi-caustic types who seem to live to post negative responses. Not really trolls; they often fit the "serious" category very well.
There are the goof balls who like to add humor but it's easy for them to go too far - that's the nature of humor when you don't have a small audience. (You know, that off-color joke, or anti-<pick your favorite politico>-barb that you share with one or two close friends? Doesn't work as well on a board, i.e., in public.)
There are other types - some are kind of a mix.
On "my" board we try to let the members have their way with one another. There's a "Report to moderator" feature (for a specific post) - this works sort of well (if I give a spit) - and an "Ignore" feature (so you never again have to see a specific member's posts) - this not so well: others might just refer to those posts and <gasp> you might see something!
We solicit donations and sometimes a paying member thinks he can hold us hostage by threatening to take his cash and go home. Not gonna work.
I'm asked over-and-over (sometimes by well meaning folks, and sometimes by someone trying to set me up - someone who doesn't think his 5HIT stinks) - to post some kind of "rules" and I have deliberately avoided it. Any rules I post will be challenged (get its nits picked) or used against me.
Personally I find this board's balance excellent. Kudos to the mods/admins and the members.