It gets back to one of the key ethos's at En World: "Don't try to win". I think too many people have forgetten this and alas, good people and posters don't have the presence on the boards that they once had.
Best Regards
Herremann the Wise
As someone whose visits ENWorld with less and less due to similar concerns with the hostile environment, I can understand where the OP is coming from. Your advice, while good in principle, from my experience doesn't always hold up in practice. Posts that seem harmless questions or invitations for discussion suddenly become the flamebait of the day. I too, have noticed a less-than-consistent oversight by the admins of the site.
[And that particular criticism isn't sour grapes on my part as I'm not referring to my posts I've made, just ones I've read. The one time an admin gave me a warning, after rereading what I had written, I understood where the admin was coming from.]
I've written posts and then cancelled them b/c I've learned to assess the likelihood that rather than discussing RPGs, campaigns, plots, etc. it'll be threadjacked for the edition-war-thread of the day. Once you feel like you're likely to be attacked, dismissed, etc. and that trying to get thread responses back to the good-old-days will be viewed as trying to "win", one starts to wonder "why would you even bother?".
I used to come to ENWorld to relax, read story hours, and share some ideas with fellow gamers. There are still a few story hours I read regularly, but 90% of my game-related posts are now made on other sites. I'd like to think that ENWorld will one day return to what it used to be but I think those days are long gone. If it ever does return, I think it's a long, long, long way off.
I sincerely hope I'm wrong.