Time Turner: Was Just a comment about Lupin's malady.

[Liz]

No: HPFGUIDX 108611

earlier from Amey:
(snip)I don't think time travel will be used to do anything that 
important. Saving Sirius was one thing, (after all, he did not live 
much on borrowed time.(end snip)

Liz now:

I've wondered this too, and having always been fascinated by the use 
of time travel in fiction. And I like this theory that it is being 
used for things not that "important", especially because we've
been told that time-turning is highly dangerous to any wizard who 
uses it; isn't it supposed to be able to drive a wizard mad if he 
sees himself while using it? However, I don't think that saving 
Sirius, Buckbeak, Lupin, and Harry during PoA were frivolous uses of 
the device.

There might be rules and regulations we don't know about (yet) for 
the time-turner, such as that it can revolve only so many hours at 
once, or only so far into the past? Perhaps the user would suffer 
severely if trying to warp too far...?

But, my burning question is why Hermione, albeit smart as a whip, is 
allowed to use this device during such a turbulent time and being 
such a youngster. Just to take more classes? Is she trying to 
graduate early? We've not learned a lot about that device; I think 
we've either stumbled upon a truly "for narrative-purposes only" 
device, or we will soon see it turn up again. Perhaps then we'll 
learn why Hermione was the person JKR used to first show us this 
device, and that H will again be the one to have it on loan.