Hi @mcgyvr
I just logged in to put this message through.
There are many people like you in Autodesk forums answering questions without offering any solution to it.
You are almost judging the user about why would he/she have to select multiple faces in a part or assembly using rectangular selection method. Mate, I assure you that there are many cases where you really want to select multiple faces by dragging a rectangular zone on your screen.
It could be a knurled area where you do not want to select all faces one-by-one, rather select them as a whole. Then you can clear the unwanted faces from your selection.
Anyways,
Check the message #7 by ChrisMitchell01, you are going to find that this multi-selection thing is already implemented but not in an obvious manner.
So, my suggestion to you, if you really want to help users of this forum, just don't answer any question that you do not know the exact answer, let alone ask people why would they want to do what they are trying to do within the software. You are just wasting the time of people like myself who might come into the thread occassionaly after many years, and getting nothing out of reading your nonsense reply.
Best regards,
Tayfun