Zero there is already a lack of hold out spaces in these maps to begin with between 28 - 36 players and this would only limit it to an insanely low amount of spots and besides people fuck up in those spots all the time and get killed so theres no point to doing so.
and if its rigged up in the humans favor and your one of the last zombies, play dead and wait for them to get bored and come out, there is no need for this discusion anyways, it is not illegal and should not be illegal, walter quit bitchin and use your head.
and stop making up bullshit rules that only serve your needs ya roof camper.