How to effectively stop RemoteEvent spam

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A similar method that tends to be more clean is to just set the value nil after a set amount of time like so:

local remote = game.ReplicatedStorage.RemoteEvent

local tab = {}
local cooldown = 4
remote.OnServerEvent:Connect(function(player)
	if not tab[player.UserId] then
		tab[player.UserId] = true
		-- do whatever you want, but you might
		-- want to wrap it in a pcall just in case
		task.wait(cooldown)
		tab[player.UserId] = nil
	end
end)

It’s a method that works pretty well as long as the cool down isn’t too long.

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