First. Most things are taken very easily. People leave things unlocked and out in the open for an opportunist to take. The majority of things taken from the owner fall into this category.
Second. The majority of things taken from their owners are taken by casual thieves. I understand that this doesn't help when you get something stolen but it is the truth. A true professional thief won't normally target something easily traceable.
Third. It doesn't take much to deter theft.
I know that those seem really easy to understand but most people don't.
Most people when walking down the street will pick up a dollar from the ground and not think twice about it. If you saw someone drop it then many would stop them and return it. If there is no one around then they might just keep it.
It is the same with a scooter. There are some people that when seeing a scooter on the street will look around for the owner then take it on a joyride or move it around to mess with you.
The way you can eliminate the casual person that wants to take your bike for a ride is to show them that the owner is watching. This could mean a disk alarm, a chain around it, or a normal alarm. This should deter the person walking down the street that takes the opportunity to get a scooter for a joy ride.
The next category of people are the ones who go out in the morning and make a decision to steal something today. They will then get prepared for a day of stealin. They will have a truck,van or trailer and the tools to defeat most things you can do for your security, but are still lazy.
We had a ring of car thieves targeting the parking lots around where I work. The made a living just stealing cars and bikes. In the parking lot of 15 or so bikes they took the one bike that had no type of security and left the others. They showed up with a stolen cargo van with a trailer. The ended up leaving the van and taking one Harley and a caddy truck.
These were professionals and they had the tools to cut cables and the like but still took the easy way out. Moral of the story is make the other bikes look easier to take.
This group of people will just drive around till they find a minimum risk situation to steal something. If you are in a crowded parking lot and your bike has a disk alarm it might be just enough to deter a low level professional. A chain or cable to something solid it nice but not if the person trying to steal it can't see it.
So if you have a disk lock then get a minder for it that's a bright color. If you have a chain or cable do the same thing. Draw attention to your security devices it might save your bike.
The last group of people are the hardcore folks. These are the guys that will get what they want no matter what. There is no way to stop them. They will get into a garage and cut down the main support to your house to steal something. The only way to avoid them is to never go anywhere on the scoot and don't let anyone know you have it. If someone in this group targets you make sure you have good insurance.
I figure that this post won't go anywhere but it felt good to get this stuff off my chest. I am kinda tired of people discussing security but not admitting the basics. Just remember that you need to target who you are trying to keep from stealing your stuff and use that level of protection.
When I was doing repo work I fell into the last group. I took every tools I needed to effect a recovery because I knew I usually only had one clean shot at something before the holder would hide or secure the property. I can say that there is not one thing I was tasked with that I did not recover. All it took was a bit of time and the right tools to collect anything.
Thanks everyone for your help (and for not mocking me...for now anyway). 
let in the keys?
