Emphasis on proper address was: Snape as father figure

[pippin_999]

No: HPFGUIDX 131258

Lupinlore: 
> Oh, not weird phoenixgod, I definitely agree with you.  :-)  Snape
has not earned Harry's respect, and Harry should not give it to him,

Pippin:

Respect may not be due for the teacher, but what about the
subject?

We've known from day one that potions  are dangerous, even 
life-threatening, if mishandled.  If the authority of the
professor is  not respected, someone could be very badly hurt. 
Regardless of how he feels about Snape as a person, Harry 
cannot be allowed to reject Snape's authority and remain 
in his  class. It would endanger him and all his fellow students 
besides.

Pippin