How do you feel about "lawn ornament" bikes?
With my "every bike has a purpose" mindset, I've only had two occasions where I've felt compelled to allow Mother Nature to reclaim a bike as her own.
The first one was actually my mother-in-laws step thru single speed, that had made it's way from the farm to the city and then to me. It had numerous mechanical issues, had been brush painted many times, and just wasn't anything I was interested in. Alas, my wife didn't want a junk bike out in the flower beds, so I gave it to another bike enthusiast... he later told me that the only part he hoped to save on the bike ended up being worthless because someone had welded one of the pedals to the crank.
I didn't find the right solution from the Internet.