well best case (in the worstcase) is youl snap a hanger or derailer /chain
or at worst tear out a chunk/bend of chainstay or frame
thats not taking into account the damage to you if you jam in a intersection or any other bad place to be when it happens
you might know how to shift gears and keep your system tuned but the next person might not
any system sold to the public should be fool proof
I am not here to piss on your parade just debating