I lock mine up with a cable wherever I'm at plus I had an alarm added for quick stops after someone tried to steal mine. As for the alarm - don't use it except for a quick stop 'cause it will drain and kill the battery. It's better to take an extra minute to lock it up than it is to have it stolen.
As for the attempted theft of my scooter - it happened right near Lomas and 12th Street where everyone could see about 2:00 in the afternoon.
Sorry to hear about the stolen scooter. In my rides around downtown I've seen a notice about a stolen scooter too. That's so sad.