http://www.ebay.co.uk/itm/Mines-Carbon-Front-Splitter-Front-Lip-for-Nissan-350z-2007-2009-FACELIFT-/251334380942?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3a84b24d8e
Pure sex
I think the reason it's cheaper to park on the street is that potentially a thief won't know where you live to steal your keys. But in your example it does seem rather daft!
Try Adrian flux, and Chris Knott insurance
Also have a look here:
http://www.350z-uk.com/forum/42-insurance/
Comparison sites are not the most competitive I'm afraid. You've got to phone and discuss things with brokers.
Because she had a kid in the car which they spotted and didn't want to risk injuring it which is rather noble considering the danger she was putting them in.
I wonder why she did it. Feel sorry for the child.