I think the idea is fantastic ! I like to stash equipment and then scavenge into towns with nothing on me anyways (except for the hatchet) so that i cant make noise if i have to dispatch any zombies. Being able to push them away means that you can more effectively search a building. This could replace the lack of being able to bar doors shut and the like in order to buy you more scavenging time. It could easily be balanced by making you more vulnerable to attacks from other creatures, thus one couldnt simply push a hoard of zombies off of them, at least without consequences. Great Idea !
