Why did Ginevra petrify Mrs. Norris anyway?

[Geoff Bannister]

No: HPFGUIDX 98921

--- In HPforGrownups at yahoogroups.com, "Geoff Bannister" 
<gbannister10 at a...> wrote:
> --- In HPforGrownups at yahoogroups.com, "vmonte" <vmonte at y...> wrote:
> > vmonte:
> > 
> > All this talk about Ginevra has got me thinking.  Why did she 
> petrify 
> > Mrs. Norris in CoS? 
> 
> Geoff:
> She didn't. It was the basilisk wot did it... onest, guv!
> 
> :-)

Geoff again:
Picking up on my own reply and that of Burno (message 98916), I 
noticed an interesting point when I glanced at the relevant bit this 
morning....

'"Haven't you guessed yet, Harry Potter?" said Riddle soflty, "Ginny 
Weasley opened the Chamber of Secrets. She strangled the school 
roosters and daubed threatening messages on the walls. She set the 
serpent of Slytherin on four Mudbloods and the Squib's cat"'

"COS "The Heir of Slytherin" p.229 UK edition)

Interesting - was Mrs.Norris petrified deliberately because she 
belonged to a Squib? Seems a typically underhand Riddle/Voldemort 
sort of action. Was Filch not likely to come up against the basilisk?