I don't.. he PAYS for his internet connection just like the rest of us and we ALL should be expected to USE that connection for any LEGAL purpose.
I, for one, do NOT like the idea of any caps, invisible or not, on a 'broadband' service.. it's pointless and defeats the whole broadband premise. I say Let us use our expensive connections to their fullest.
P.S. I avg approx 250 - 280GB /mo total up and down in video (mostly anime) and misc web files (I run a few large websites) so I hear where the OP is coming from.