When you don't use the slide locks, the entire moment of that slide bouncing around is being applied to the slide mechanism. Every time you go over a bump, the slide feels it, and so do those twelve little screws that keep it attached. The slide locks prevent the top of the slide from bouncing in and out. It has less to do with keeping the slide rolled in, and more to do with keeping the slide attached. It takes me less than five minutes to find where my wife hid them and get them installed.
Brian, Mary, kids, beagle - Moose, and mutt - Maggie.
2012 Greyhawk 31FS
2013 Ford Explorer Toad