Can the Marauder's Map be deceived? (and more questions)

[Fred Waldrop]

No: HPFGUIDX 54334

  
"Susan Atherton" <suzloua at h...>  says:
 <snip>
Doesn't it make sense that since she was using it "only for [her] 
studies" that all the teachers would be aware of it?
I know it's tempting to think only McGonagall, Dumbledore, and 
Hermione know about the TT. But what if Flitwick makes some offhand 
comment in the staff room about Hermione Granger performed a perfect, 
oh, I don't know, Wingardium Leviosa ;). Snape frowns and says "But 
Miss Granger was busy being a know-it-all in my classroom at the 
time." Cue confusion, questions, and awkward answers for McGonagall. 
(I can't imagine Dumbledore ever feeling awkward, so no awkwardness 
for him :) )
I think all the teachers who taught her - so that's Vector, Sinistra, 
McGonagall, Snape, Flitwick, Lupin, Sprout, and whoever teaches 
Muggle Studies, plus anyone else I've forgotten - knew about her TT.
 
 
<snip>
Gina R Rosich <grosich at n...> says:
While you raise an interesting point, I think the answer is no.  
Because Dumbledore tells Snape outside the infirmary that there is no 
way H&H could be in two places at once.  If Snape knew Hermione had a 
TT, he would¹ve immediately made the leap and suspected her of
using 
it.

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Hello all, Fred Waldrop here;

I know this discusstion has been going on for some time, but I 
thought I would just put my two knuts in.

IMHO, the Marauder's Map shows the person what they want [or](need) 
to see. In Harry's case, it showed where the teachers were, and any 
one else who could cause problems at that time to him.
So, when Lupin wanted to see where HHR were, it showed him that(plus 
of course, his friends that helped make the map).
If it showed everybody, the paper would be so cluttered with names it 
would not do anyone any good. I mean, if you put 1000 students, 20 
teachers(? or more) and other staff, on a piece of paper less than 
12"X12", it would be umreadable.  

Unless Lupin was sorta expecting to see 2 sets of HH, he would not 
have wanted to see them both, and therefore, he would not have seen 
them. I know that it has not been in canon that this is how the map 
works, but as far as I remember, there has never been any canon on 
exactly how the map work. So, if the map is "magical", then it might 
somehow read your mind, and then show you what it is you are wanting 
to see.

Fred