(UNSOLVED) Attempt to create anti-btools exploit with certain people able to bypass them?

I was advised to rewrite the entire script since it only works for local scripts and that can easily be bypassed. What I am trying to do is have an anti-btools script since exploiters can still use btools to remove walls locally so they can traverse distances easily, whether to annoy people or not. I attempted to not only code the anti-exploit so that it kicks people but also certain group members that are in a certain rank or higher can bypass this. I cannot identify the problem causing the script not to work. I am kinda a rookie at scripting, sorry.

game.Players.PlayerAdded:connect(function(plr)
    local Backpack = plr:WaitForChild("Backpack")
    Backpack.ChildAdded:Connect(function(Obj)
        if Obj:IsA("HopperBin") then
            if plr:GetRankInGroup(10000) <= 20 then
                plr:Kick("Btools are not permitted, stop trying to exploit")
                print("Possible exploiter detected")
                local hint = Instance.new("Hint")
                hint.Text = plr.Name .. "possibly attempted to exploit"
                wait(15)
                hint:Destroy()
            end
        end
    end)
end)

EDIT 1: I need to fix this script even tho there are other ways to locally destroy walls, otherwise it would become a very bad habit for me since I could not find problems in my code that causes it to not work.

EDIT 2: This post is a second attempt of trying to solve the anti-btools exploit with only certain people being able to use it. You might find another question prior to this that I posted. The previous post made by me is not a duplicate since they are both different scripts, the first one only worked for local scripts, my second script I rewrote was supposed to work serverside for more security.