Just watched the ACA video. After seeing that footage, I don't understand why sooo much emphasis is continually being placed on how impossible it would be for an abduction to take place undetected in that street. I think it's TOTALLY POSSIBLE! It's more possible, in fact, than in your average suburban street in Sydney!!
The houses are set so far back from the street that they'd be hard pressed to see much at all. There are tall trees surrounding WT's grandmother's house.
For the VERY fact that no one believes that something like this could happen there, is probably why it did.
Yes, it is quiet and peaceful. But that doesn't mean that people are hearing every movement on the street. Apart from being set back from the street, the houses are widely spaced apart. A car could have been parked somewhere out of the direct line of vision of any one particular house.
Whoever did this, would have been clued up on the area and have done their homework on the logistics of how to carry an abduction out - if it were an abduction.
It certainly sounds like this is the line of inquiry that police are now pursuing and locals are taking it seriously, what with walking their kids to the bus stop etc.