BBM... IIRC they didn't report on the condition of the bikes much at all, though. In other words didn't report any damage, but also didn't report no damage. They were variously reported as laying across the trail, laying neatly, and leaning against the fence (or gate? can't recall which). I still think the bikes may have never been moved once they got to the lake, just people describing it differently, but I could be wrong of course.
All along we've been asking amongst ourselves if the bikes were scratched, damaged, had gravel in the tires, punctured tires, etc. but I haven't seen it reported either way.
Related to the previous question, how? I think the easiest would be to get them to stop their bikes for any number of reasons. Threatening - "Stop NOW!" by someone who looks like an authority type figure, or even easier IMO would be some sort of story that friendly, innocent children would go with. Someone somewhat familiar pulls over to say hi, they're distracted talking to the person, then they're gone, either with that person or someone who grabbed them while they were distracted. Someone's on the ground "hurt" and needs help, they stop to help. All kinds of possibilities.
Personal antecdote, I'm reminded of a time a couple of years ago and I should know better! I was Christmas shopping and walking to my car when I heard a woman sobbing. She was wandering around near her car and on and off her cell phone with obviously upsetting calls. She was aimlessly saying "please someone help me" but she was in a weird part of the parking lot, pretty dark, no one else was probably even within earshot. I got somewhat near her and asked her if she needed help or wanted me to call someone. She immediately went into this long story about how she and her son got into a fight, he was on drugs, he threw her dog ("my baby") into traffic and she didn't know if her dog was hurt or killed. I think her son was just being a <expletive> and told her that on the phone trying to get money from her for "vet bills" (ahem, drugs), but anyway... I felt so bad for her. The more she talked the closer I got until we were a few feet from each other behind her car. I asked if she wanted to move somewhere better lit with more people around since she seemed afraid of her son, but she said "no, I don't want people to see me like this." In between incoherent sobbing she kept thanking me for being there and listening to her.
I talked to her quite awhile in that dark, isolated part of the parking lot. I could've easily been grabbed by someone if they wanted to. I even offered to drive around with her to try to find her dog - me driving, her in my car, but what would it take? 10 seconds for her to go from sobbing to evil and well, yikes. Once she calmed down some I gave her a hug before I left. How easy would it've been for her to grab me and throw me in her car? I either wasn't "their type" or she was sincere - I prefer to believe sincere - but if I heard the same story as a kid and I didn't have a car? I don't like to think it, but I might've gone with her to help her.