The evidence is trivially googleable in every country and language.
Most commonly it is lost internet access or fines of only a few thousands.
A few thousand is beyond a lot of people, especially in this endless recession.
It can be confiscation of equipment and has led to loss of employment.
People have been jailed for it, faced years of uncertainty over extradition.
Parents, children, teachers, grandmothers, pretty much everyone knows someone who has had at least some trouble.
That is not to mention the technological stagnation, the denial of the blind the right to convert documents to speech, works unavailable in whole countries, the trumping of fair-use by DRM, the hours lost trying to convert media, the denial of access to publicly funded science.
The invasive anti-privacy laws, the time wasted fighting SOPA, PIPA, the clipper chip, &c.
Those who stood in court up faced legal destruction akin to Jammie Thomas, in every country.
The chilling effect on innovation & technological takeup.
Napster was the killer app that kickstarted broadband adoption in the UK, nevermore.
Kids who love music would get into coding - but music startups, even highly legitimate ones are a total no go - the monopolies are too entrenched and stupid.
New cultural forms, remix and mashup are outlawed - NWA's original wall of sound was a cultural dead end as licensing the thousands of samples is impossible.
A entire new form of black American music outlawed.
The loss of orphaned works and rare episodes.
The prosecution, hounding & subsequent death of Aaron Schwartz.
The harm cause by these monopolies is vast and unnecessary.
It could be solved overnight by a blanket license and collection agencies - just like it was for radio.