I can't be bothered to go through all of those threads (the second is very long), but what I've read of it wouldn't exact encourage me to participate, and indeed, after reading all that, I'd avoid it like the plague!
I've done a smattering of large rides, but mostly things like the London Freewheel (The Sky-whatever these days), otherwise I've only done rides which top at just over one hundred riders (the FNRttCs). That many people, some of who clearly aren't behaving that well, and what doesn't sound like appropriate organisation for an event of that scale, makes me think that there's little reason to get involved in Sportives in general, and that specific event in particular.