Knight2King--Hermione is McGonagall

[Robert Jones]

No: HPFGUIDX 88571

I just want to register my protest of the use of time travel as a 
major plot device.  JKR used it once in POA to good effect, but to 
make it part of the solution at the end of the series is a different 
matter.  

The theorists have Dumbledore/Ron trying to change little things and 
not doing it very well.  But if you can go back in time to change 
history, why don't you just go back and kill off Tom Riddle as a 
baby?  You would save all those witches and wizards lost in two 
wars.  This would be a "major" change of history and not a "subtle" 
one, but if you can change history what is the difference really?