It's not that easy. The site will also have to deny to remove the contents. I'm pretty sure SO would remove such content, simply because it's off-topic there.
I'm sure there is sub-exchange on stackexchange, where it's not an off-topic. And as soon as stackexchange share the IP with SO it will be blocked all over. Thanks for the idea.
Then, there's still the question whether SO will comply or not. Given that reports of suicide trigger more suicides than without, I wouldn't be surprised of SO community guidelines which discourage such content, even though it might otherwise be ontopic in that specific sub-exchange.
Maybe we should follow the money? Who profits from it? Those selling VPN access. But maybe the full VPN is not needed at all. See my other messages here.
It can possible be orchestrated by some corporate interests but I don't believe they are powerful enough to overrule entire IT sector interests. It really seems more like a blunder of inadequate policy implementation like it was done a few times before.