I use my steering lock every day and would feel vulnerable w/o it. Are you going to get a big chain and padlock to keep someone from rolling your bike away now? Or you could get one of these.

http://www.xenasecurity.com/product/motorbikes/alarm/XZZSeries/XZZ6LStainlessSteelPlated/page1/

"Catching a yellow jacket in your shirt at seventy miles per hour can double your vocabulary" Author unknown