I would venture to guess that if the economy continues to get worse crime will rise. I used to live in NYC and there you need to tie everything down and not just with cheap chain, you need something bolt cutters cant get through and or even a portable power tool. So you have to use these Kryptonite chains, you can take a grinder to this for an hour before you get anywhere.
I now live in Charlotte, North Carolina, but still have to be very carefull. These things are easy to steal, I'm 5'7 and if I had a buddy and a truck we could simply drive around and steal these things all day. Don't chain to anything too short. My buddy had his scoot stolen when chained to a short parking sign. The thieves simply lifted the bike 3 feet off the ground, pulled the chain over the top and wheeled it into their van.
If you love your scoot like I do, don't get lazy when parking it, spend the $100 and get the Kryptonite long noose chain (the picture is a short one)and chain up to anything that won't budge.