@kawaiinekololis You could make a list of servers, along with metadata (avg. players, staff activity, anti-cheats), but that seems difficult to maintain.
it not Disabler might disable anticheat, it use to exploit anticheat, so u can cheat perfectly without being detected, but u got ban instantly because staff is too active, try cheat on some times that staff it won't active, u don't get ban instantly
You were to late to use the Mineland Fly. It was working fine but it was patched a few days after being added, you probably tried to use it when it was already patched.
Yes, it is. Minecraft sends a client brand which is usually "Vanilla" - unless you are using Fabric for example. It's not that uncommon to use Fabric these days, as more people are using it for things like Sodium - but it's a way for the owner to check if you're using a modded installation.