Kill switch master disconnect cut off ???

Kill switch master disconnect cut off ???

I'm about to mount my battery in the trunk, I figure I'll need a kill switch on my rear back panal as it'll be a street/strip car.. My two local tracks arent real hardcore on tech inspection and I'll never be running a NHRA track.. I was wondering if I could just hook the GROUND to the kill switch instead of the POSITIVE and get away with it?? It seems the wirein' to the cut off switch would be easier and I'm guessing the switch would last longer not having the hot wire run through it... What do you guys think??