All I have for now is a simple Disc Lock ($19.99) that I use when I have to leave my bike parked out in the parking lot at work where I can’t see it. I hadn’t thought of a group pulling up in a van and just lifting the whole thing and taking it away. It certainly could happen. However, the Disc Lock was very inexpensive, and it is what I can afford for now. It’s also worth mentioning that I always engage the stearing lock before I remove the key. I’m not sure how difficult that would be for a thief to disengage, but at least I can try to keep someone from making a quick, easy getaway.