Personal opinion here - steering locks are worthless. They are only for the semi-honest, as anyone who really wants your bike can do a sharp twist on the handlebars and snap the lock pin. I have seen several bikes with the steering lock busted by thieves.
If you really want to make your bike more theft-resistant, then park the bike, put it in neutral, engage reverse and then shut the bike off. Locks the transmission, no one is going to push the bike away. Word of caution - make sure your reverse switch does not stick otherwise - you ain't gonna get it out of reverse and it won't start till it is out of reverse.
I use the reverse method when parking overnight at a hotel. As well as covering the bike and trying to get permission to park by the front door area so the clerk can keep an eye on it.
Double Darksider #847
IBA #54767 BB1500+
Who I was yesterday is but a past memory, who I will be tomorrow is in the future. Who I am now and the type of person I am to others, that is what is important now.