Uhh, I love answers like: dont hit the key. That is no solution.
ah ... why not? whats the difference between "not hitting the ALT key" and something like "unbind ALT key to not show things when pressed"?
is there any mysterious dark power that forces you to press the ALT key? if not, then, well ... as long as you do not hit the ALT key you will not be shown things lying around which - by coincidence - is exactly what you are asking for, isn't it?