How to lock your scooter?

Another option from the "so obvious, why didn't I think of that first" file: just fold the scooter up and take it inside with you. It will fit on the lower rack of most shopping carts with some clever positioning, and for me at least, no stores have even commented on it except Walmart. They only were concerned about whether I was shoplifting it.

My local public library also says it's fine to just take it in with me and put it beside the desk while I read.

This won't always be an option but when it is, I think you're far less likely to get your scooter stolen. Given how often bikes do get stolen around here, I'm not convinced any lock will keep away a determined thief, and these things can be easily carried with one hand or function as their own getaway vehicle. I'd love to see others' recommendations though.