What side is Filch on?

[karen]

No: HPFGUIDX 170158

I'm re-reading 1-6 so I may have forgotten some things that have 
happened past book 2 however I found something interesting in book 2 
today.  I do hope that I'm not repeating a previous discussion...

Ron: "I know that name... T.M. Riddle got an award for special services 
to the school fifty years ago."

"How on eart d'you know that?" said Harry in amazement.

"Because Filch made me polish his shield about fifty times in 
detention," said Ron resentfully.  "That was the one I burped slugs all 
over.  If you'd wiped slime off a name for an hour, you'd remember it, 
too."

Now we know Filch is very particular about keeping the school clean but 
could it be a clue that he wanted this shield so clean.  Ron says 
nothing about scrubbing the others for so long.  Is Filch who we think 
he is?