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I don't follow facebook, but did read the comments here (referencing facebook) regarding the man seeing a bike on the path at 12:27. Police have said that the bikes were found together leaning against the fence. The facts don't line up between what the man said he saw and what police discovered. The only possibility is that the kidnapper put a bike in the path and then later decided to lean it against the fence, but why would a kidnapper spend time arranging bikes? That seems too risky.
I agree about it being risky. My thought on the bikes is IF the TG sighting/swerving incident is true and accurate, it's really likely someone just being helpful moved the bike(s) off the path to help avoid an accident. I can almost hear them grumbling "damn kids leaving their bikes everywhere." All huge "ifs" but IF that's true I bet the poor person is really not happy right now that their fingerprints are on the bike(s)!