Eh, it's more of a rage button anyway. Don't think I've ever seen anyone kicked because of it. My hope for it is that it makes people more aware of their teamhits, since, while most people are careful about teamhits, some people just don't seem to care.
Anyway, if it stays like it is (with people just hitting 'm' whenever they see the text) then I agree to disabling it, but I'd like to see it kept for a while longer and see how it goes.