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The thread had degenerated to singling out a guy as a troll with alt ID's. (He was a pita for sure). A few others chipped in with the corporate conspiracy meme.
The problem was that it was started as a way to explain that yes, it's understandable that people who kept calling the membership program a greedy grab for money and impugning Cakewalk as being liars and such had goof reasons to be so cynical about the world in general. I just found it really sad and depressing that the world had deteriorated to a point where people automatically assumed that anything was done for the wrong reasons, having been bathed in it for five days straight. But then it got into a whole thing about capitalism, twisted what I said into something completely different that was going to have to require additional explanations (ironically, by interpreting what I said in the most cynical possible way so at least it was consistent with the premise

) trolling, and veering off into purely political topics that had nothing to do with the reaction to SONAR in amongst the rest of it.
I suppose I could have been industrious and deleted the political posts and left the rest, but posts often dealt with both. And then people would have said "why did you edit my post. Censorship! Evil!" Some people felt it wasn't an appropriate topic in the first place, while others did because it addressed an attitude that had been pervasive over the past several days within the SONAR forum itself.
The troll who was called out acknowledged that he'd posted under multiple alts and got conciliatory, as did I for his acknowledging it. So it seemed like the thread had run its course and my concern was that it would flare up into more politics, as it had already crossed the line for excessive political content and that element was picking up steam.
Frankly I was not aware of the degree to which politics could not be brought up in any context in these forums. At Harmony Central we had a dedicated political forum precisely for this reason, but if there was a political issue that impacted music (e.g., copyright revisions) or products (e.g., Gibson raid), it was allowed to live in music or product forums. Given that the topic was entwined to the reaction specifically to SONAR, I figured it was a SONAR forum thing. That is very clearly not the way things work around here.
The final element was my wife was rushed by the hospital shortly before I deleted the thread. I realized it was going to be a long night and I would not be able to monitor the forums any more at that point. I felt it was risky to leave such a potentially volatile thread unattended.
If anyone wants to make up a conspiracy theory of why it was removed other than the pretty obvious reasons stated above, feel free. We can always use another conspiracy theory.