At the end of the day, if people really wanted this software, the providers could default to making it opt-in and on balance they wouldn't be any the worse off for it.

There is a clear reason "I Agree" is pre-checked. Educating users is a band-aid, treating the symptom and not the cause. The cause is scummy companies like InstallMonetizer, and hopefully people like PG/YC will come to see how it hurts their brand, no matter how they think reality differs from peoples impressions of such companies.