I have several monitors and use the taskbar autohide feature together with fullscreen applications, so I don't know which window currently has focus. Pressing win+{currently focused window number} makes that window minimized and it is really annoying.
There is a similar question already, but it solves this problem for mouse clicking only.
{#1},{#2},{#3}...
and then do nothing. Haven't tested it so far but I guess its possible.