Why Not a Memory Charm

[rhkennerly]

No: HPFGUIDX 187999

I've started a re-reading of book 7 DH and working through the drama of whether or not the Dursleys are going to leave and go into hiding.

1.  why was this left to chance? (Nobody in HP's circle loved the Ds, but they wouldn't want them tortured and killed either)

2.  why did HG get to use a memory charm on her parents and ship them off the antipodes but HP couldn't do something similar?

Rick Kennerly