It's such a lazy bitch move to blanket block vpn users. For anyone intent on causing meaningful harm it's trivial to bypass, so the only ones really impacted are the innocent mass of privacy minded people. Unnecessary hassle for people doing nothing wrong.
It's the most popular instance with questionable politics and moderation and this move pushes people to other instances before they even discover deeper issues there. Most instances have zero issues with VPNs, and it doesn't even matter what is the parent instance of community you're posting to. Which means you can post the same stuff into the same place from almost any other instance using VPN.