Two years ago I bought the rage 2 blades and had the same thing happen to me. Except I shot at a deer and had the blades open in the air and luckily I missed instead of injuring the deer. So I didn't want to spend the money on a high priced quiver either so every time I went into the woods I checked the blades once I was in my tree. It was rather annoying so I switched to the Grim Reaper Mechanicals.
You are just going to have to check everytime you get into the woods or make a switch. The grim reapers are nice and they are spring loaded so you don't have to worry about them coming loose.