Kelly,
Well, I am sure Rees and Fazio and Damian Pascuzzo weren't exactly willing and able participants here either! Niether were Tilly and Burbeck, etc. but I see your point. As to Ran, I agree(d) that ultimately, we are all responsible for our own post content, but I do think most websites lock threads, take away posting privleges, etc. as necessary. Luckily, its rarely needed here. It may have been a case where he could have tapped the brakes a bit. Who knows, there may have been private emails to the main combatants to tone it down.
I don't really know the protocol of such things, but as internet sites like these are used more for historical research dissemination, I presume the code of conduct for posting such "In my opinion" pieces like DM's would get refined, just like fact checking in print media and television has.
The funny thing is, I went back to reread the first part of DM's essay, in large part due to the comment that Ran explicity endorsed his views. The entire intro to the piece admits that there are flaws, its not finished, and is entirely respectful of Merion. It apparently contributed some new facts and also apparently had a few inaccuracies.
But for the most part, the disagreements over Merion have been emotional opinions on all sides. No one disagrees that CBM spent four or five days in total consulting with Merion. Or that Hugh Wilson spent a lot of time on design and especially construction early, and on design and construction in 1924-5 which shaped the final course. Absent a lot of documentation, there is a lot of debate about how much CBM could have done in those days and what it means as to the attribution of the course.
Some say "consultand" or "advisor" is proper. Others say "co-designer" would be more appropriate. DM at least once asserted that "designer" would be most accurate, but I don't think he's firm on that anymore. I am still unsure of why that kind of name assigning would lead to so much name calling among the usually distinguished participants here.
So, yes, we are all ultimately responsible for our own writings.