Do you honestly think a passerby is going to question a bunch of guys picking up a bike and putting it into a van?
Most people assume that you can't make your payments and it's getting repo'd, or they're too focused on their own stuff to even care.
My friends car was stolen with a tow truck, neighbour saw the whole thing, just thought he missed a few payments. Tow truck was stolen too. Can't underestimate thieves.