Why client-side anti-cheats flag speed modification:

Games use local scripts that periodically check if Humanoid.WalkSpeed > 16 then Ban() end.

The Metamethod Bypass:

local mt = getrawmetatable(game)
local oldIndex = mt.__index
setreadonly(mt, false)

mt.__index = newcclosure(function(self, key)
    if not checkcaller() and key == "WalkSpeed" and self:IsA("Humanoid") then
        return 16 -- Always return standard 16 WalkSpeed to game security scripts
    end
    return oldIndex(self, key)
end)
setreadonly(mt, true)

You run at 100 WalkSpeed while game scripts read exactly 16!

checkcaller() filtering ensures that your own exploit UI reads real values while game scripts receive spoofed values. Textbook metamethod hook.

Completely neutralizes client-side WalkSpeed auditors.