Why did Petunia Dursley accept Harry at the beginning?

[amanitamuscaria1]

No: HPFGUIDX 99635

--- In HPforGrownups at yahoogroups.com, "mariofett1187" 
<Mariofett1187 at a...> wrote:
> Dumbledore explains to Harry at the end of OoTP the magic 
protecting 
> him at Privet Drive-but why did Petunia accept the baby on her 
> doorstep, when she and Vernon wanted nothign to do with Lily's 
> family? 
> 

AmanitaMuscaria now - I've presumed Dumbledore used some 'persuasion' 
on Aunt Petunia - possibly also on Vernon? I suspect that's where the 
missing day went - taken up in convincing the Dursleys to take Harry. 
That's not to say they would remember anything about it, only some 
sense that they _had_ to take Harry ... I suspect obliviate might 
have removed the memory of the convincing, but left the compulsion? I 
presume just doing an imperio on them wouldn't have worked - I get 
the sense there's more to the 'ancient magic' than what could be 
forced.
I also believe that's why Sirius Black had to die - we've got 2 books 
left, with more deadly attacks coming. Dumbledore states that while 
Harry could still call Privet Drive home, he'd enjoy the protection 
Lily's blood gave him. Harry was about to call Sirius Black's house 
home. I reckon it's a setup job; not ESE!Dumbledore, but scheming, 
pragmatic DD.

> On a related note, is Harry vulnerable to attack by Voldemort when 
he 
> wanders around Little Whinging? Dumbledore said that he is 
protected 
> only when he is in the Dursley's house.
> 
> "mariofett"

AmanitaMuscaria again - I presume, again, that Harry is vulnerable. 
The Dementors (if they were Dementors), though not sent by Voldemort, 
as far as we know, didn't attack the house. But why else have a watch 
on Harry when he steps outside the house?
Cheers. AmanitaMuscaria