msg cannot be destroyed, what?

So I have this code that is supposed to delete the message a player makes if it contains "hello", and then kick the player. But whenever I try to run it it doesn't get destroyed, here's the code:

local bad = "hello"

game.Players.PlayerAdded:Connect(function(plr)
    plr.Chatted:Connect(function(msg, recipient)
        msg = msg:lower()
        if msg.find(bad) then
            msg:Destroy()
            plr:Kick()
        end
    end)
end)

I have no idea why this is happening, any help is appreciated!