Bike Locks in Berlin

We have been noticing these bikes all over Berlin, and it is a little heartwarming to see that it is really ok to lock your bike to a 3 foot tall open ended pole, or perhaps to itself, or not at all. The Philadelphian in me wants to move the bike 5-10 feet just to show these people that the bikes really aren't secure. The woman at the bank told us that bike theft is a big problem here, but I don't really believe that.