This is not about arguments. This about ideology. Just read the opening words of ACTA:
"effective enforcement of intellectual property rights is critical to sustaining economic growth across all industries and globally"
That is not a fact. That is not even an argument. That is an ideological statement, and 50% of ACTA is exactly that: an ideological manifesto.
Propaganda is the primary currency here, and always has been when it comes to copyright. The other side has been fighting dirty for a few decades now, conveniently ignoring the facts, and they have been winning.
So now the opposition has started to fight dirty. It may be ethically questionable, but idiocy? So far, for the first time ever, the opposition against the ever more repressive copyright regime actually seems to be gaining some traction.
This is not a high school debate. This is politics. Not being willing to fight dirty simply means you'll get beaten up. Unless you want to keep running until there is nowhere left to run. But that is pretty much the intent behind ACTA: making sure that eventually, there will be nowhere left to run.