Straightforward readings? /TW cup

[finwitch]

No: HPFGUIDX 140752

Mira:
-- Now, it would have made sense for Dumbledore
> to transform the cup into a portkey that should have
> taken the champion out of the maze instantly. Perhaps
> a very accomplished wizard cannot override the
> interdiction to define portkeys, but once one has been
> made, he can actually change its destination. Of
> course, we don't know anything about this rule yet,
> but to me it would make sense if it was true.
 
Finwitch:

Hermione keeps saying about Hogwarts, a History telling us you cannot 
apparate or disapparat on Hogwarts grounds (in addition, Snape tells 
that to Fudge in PoA...) but: in HBP, Dumbledore grants the possibility 
in Great Hall for apparition lessons.

Surely they can, likewise, set a portkey-banners? Unless, of course, 
the Headmaster lifts it. (which was the case for GoF AND the portkey 
Dumbledore gave to Harry -- directly to his office. I would assume that 
you must be authorised to make one -- (Well, Ministry *was* controlling 
Hogwarts... except for the Headmaster's office...)

Also, Dementors *did* keep out of Hogwarts quite well, there are quite 
a few things people can do, but: the Vanishing Cabinet and some secret 
passages apparently do allow people to enter by stealth...

I wonder about that Hogwarts, a History-- is it really prudent to have 
a book describing defences where nearly anyone can read it?

Finwitch