When my motorcycle was still new to me, I took it to have it's first state-mandated safety inspection at the local independent BMW shop (Motorcycle R&R, highly recommended to any Utah airheads). The friendly inspector noted that my kill switch was in the off position, since that was how I turned it off, and informed me that that was the incorrect way to do it. He said that the kill switches on these bikes were intended for emergencies only, and would soon wear out and need replacement if used often. Since then I have not ever used it.
The guys at this shop know more about airheads than anyone I have ever met in person, I trust what they say - although I must admit that I have not since heard any confirmation of this particular bit of information.