Sandboxing Default ROBLOX Methods?

Okay, so, I've made a little sandbox, and I will retrieve part of it to ask you guys on how I could block these methods easier:

already defined player as "Player"

local ActualPlayer = Game.Players.Player1
local Player = newproxy(true)
local Blocked = {
	kick = true,
	destroy = true,
	remove = true,
}
local Clones = {
	kick = function(p)
		error("Attempt to kick player blocked")
	end,
	destroy = function(p)
		error("Attempt to kick player blocked")
	end,
	remove = function(p)
		error("Attempt to kick player blocked")
	end,
}
getmetatable(Player).__index = function(a,b)
	if not Blocked[b:lower()] and ActualPlayer[b] and not ActualPlayer:FindFirstChild(b) then
		return ActualPlayer[b]
	elseif Blocked[b:lower()] then
		Clones[b:lower()](ActualPlayer)
		return Clones[b:lower()]
	elseif not Blocked[b:lower()] and ActualPlayer:FindFirstChild(b) then
		return ActualPlayer[b]
	end
end
Player:Destroy()
Player:Remove()
Player:kick()

Look at what you are returning: just simplify

	if Blocked[b:lower()] then
		return Clone[b:lower()](ActualPlayer)
	else
		return ActualPlayer[b]
	end

This isn't a very good sandbox:

Player.Parent[Player.Name]:Kick()

The following is untested. It might represent a more full solution.

function isRoblox(obj)
	-- I wish I knew of a better way
	-- This isn't perfect...
	if type(obj) == "userdata" then
		local returned = false
		pcall(function() returned = obj.Parent[obj.Name] end)
		return returned
	end
end

local evade = {
	kick = function()
		error("No kicking.")
	end
}


function sandbox(obj)
	if not isRoblox(obj) then
		return obj
	end
	local box = newproxy(true);
	getmetatable(box).__index = function(_, key)
		if type(key) == "string" then
			local evasion = evade[key:lower()]
			if evasion then
				return evasion(obj, key)
			else
				return sandbox( obj[key] )
			end
		else
			return obj[key] -- Will always error but, useful error
		end
	end
end