Years ago, my Hayabusa was parked inside a gated townhouse community, Kryptonite 20+mm cable to support pole. Came out at 5am to leave, bike gone (yea, it's not 750 LBs wet, but it's 550 LBs wet and not easily maneuvered).
I installed a Scorpio with the RFID transceiver on the ST.
Yea, some folks will say that's overkill ... "just be sure you have good insurance".
But let's take one scenario. Let's say you've traveled to a small town on the coast for the weekend, staying a small motel, 200+ miles from home.
Bike gets stolen (I know, incredibly remote chance). You're 50+ miles from an airport, 30+ miles from nearest car rental.
Eventually, you get home and wait on the insurance company. Insurance finally pays up and now you gotta find a bike.
I'd rather wake up in the dead of night to the sound of the alarm going off (and maybe a scratch or two on the bike because it was dropped) and still have my bike, than to go through the hassle of dealing with insurance and finding a replacement.