The most extreme positions in the copyright debate tend to be expressed from anonymous or pseudonymous entities. Whether it is the group officially calling themselves Anonymous, or the astroturf Balanced Copyright group, they will attack the property rights and/or copyright of others without the honesty of doing so under their real names as citizens.
There are exceptions, and it is far easier to have legitimate policy debates with engaged citizens. On the other side of the debate from where I stand are people like Barry Sookman and James Gannon from the law firm McCarthy Tétrault, John Degen as an individual author (Previously with PSAC), or Jason J Kee who is currently Director of Policy and Legal Affairs for the Entertainment Software Association of Canada (ESAC).
Of these the individual who expresses opinions furthest from my own is likely Jason J Kee.