Canadian eBook Price Fixing Class Action Settlement

> If the Proposed Settlement is approved and you do nothing, you are automatically included in the Settlement Class (if you qualify) and you will be legally bound by all orders and judgments of the Courts.

I’m confused that citizens apparently need to manually “opt out” (by Nov 11?) of this if they don’t feel informed enough to want to participate. How on earth do people end up involved in lawsuits without their consent?