I am the same way. I volunteered last year at a local state park for an outdoor activity festival where the Hoosier MTB Association had a station and I rode my mtb from the satellite parking lot. This one kid just couldn't understand that my bike wasn't available for riding so I had to keep my eye on him, but it was also kind of cool to see someone his age so interested.

I checked out the Kuota website, and their bikes are pretty! While they don't make FS mountain bikes I noted they do make hard-tails.

I just can't see my "renting" my bike, any of them. They are customized for me, cost a small fortune (in one case took months to get) and who is to say the insurance even COULD replace them? Nope...though the concept is nice. I might consider loaning one to a good friend but it would require some thought. I would obsess over it the entire time it was gone...