I had to make an unexpected stop at Chelsea & Westminster hospital on my way home from work yesterday, I didn't have my chain with me as I don't need it at the secure office car park. I left my GTS250 in the underground car park underneath the hospital in the dedicated motorcycle section where each space has a ground anchor, but I had no chain.
I was only in the hospital maybe 10 minutes, when I came back to the car park there were two young guys scoping out all the parked bikes. They were on 50cc 2 stroke scooters that were parked but still running and they were walking up and down the rows of parked bikes. I'm sure that if I was another 5 minutes my scoot would have been nicked.