Harry's impact on the teaching staff of Hogwarts

[johnbowman19]

No: HPFGUIDX 93721

Hello all
Just something that poked into my mind while rereading OOTP. When 
Umbridge is making her inspections on teachers she asks the teaches 
how long they have worked at Hogwarts. Both Snape and Trelawney were 
appointed to positions because of Harry. Trelawney got the job 
because of her prediction about Harry, and Snape got his job because 
he passed information to the Order about the DE's and Voldemort 
before Voldemort was killed. I assume that Snape is the one that 
warned DD to put the Potters into protection. So Harry has already 
been involved in 2 teaching changes before he even attended 
Hogwarts. Also there is the DADA teaches Harry has had a part in 
make leave the school. Quirrel died because Harry made Voldemort 
leave his body, Lockhart left cause he was trying to make Harry lose 
his memory, Lupin left because Harry made a fool of Snape (and as a 
result Snape told everyone Lupin was a werewolf), Moody/Crouch got 
kissed because Harry survived Voldemort and Moody tried to him, and 
finally Umbridge who left Hogwarts for many reasons (which include 
sending dementors to attack Harry, and because she did not believe 
Harry about Voldemort (and made a fool of herself because of it)). 
So if Harry has already been involved in 7 teaching changes how many 
more can we expect? How much influence has Harry had on the entire 
WW already? When one thinks about how pretty much everyone who is 
magical in Europe goes to 3 schools, it can be seen that Harry has 
changed the world constantly for the last 15 years even without 
trying. All those people who came through Hogwarts and attended 
Snape's Trelawney's and Quirrel's lessons lives have been changed in 
a way that we cannot really comprehend yet. Did Harry change 
Hogwarts for the better or for the worse? What do you guys think? 
Was it worth Snape making people's lives miserable all those years? 

John who wishes he knew how much pain Snape has caused over the 
years.