My Nolan Modular doesn't have the D-rings and like others, I always put it on in the open position. I really like the proprietary strap mechanism that it has. I think I'd know immediately if I left it unhooked.
That reminds me of riders who cruise at slow speeds while casually dangling one or both feet off the pegs. Makes me think they're thinking of their feet as landing gear and don't wheels up until they reach V[SUB]2[/SUB]. Man when they put their feet on the pegs you knew they were about to get serious.I often see Harley rider with half helmets that have the straps hanging down around town.