I have just come back from a 4 day trip to AT, it is the first time I have seen the smiler since the accident, and I must admit, seeing it not operating is quite an unusual and a powerful feeling knowing what has happened, it almost feels like it's doing time! - Anyway, one thing I really think Alton Towers should do is put signage on the fences explaining why the car is being sent around empty etc, and why people are inspecting the track, for example 'the Smiler is currently being tested due to ongoing investigation, you may see abnormal car movements and workers on the track, this is intentional and not a fault with the ride.'
Reason I say this is because while I was looking at the rollercoaster, loads of people came past and all you could hear was comments saying this and that was happening, and they were commenting on how they would never ride it, also while I was watching, a car went up the first lift hill, stopped half way, then sort of jerked backwards a few inches, this set the passers by off again, saying its a death trap.....