Another instance I recently noticed, and reacted moderately strongly against, was this post and its comments, where there is the implicit assumption that voting (for political candidates) is voluntary, and the discussion makes no consideration of compulsory voting.
The main reason I reacted against it was that the assumption was implicit, (mainly since nature of the discussion is not relevant to systems with compulsory voting).
Another source of free audiobooks is LibriVox which is building (i.e. recording) a catalog of free & public domain audiobooks. It is all volunteer work so I’m sure there is varying quality, but the few I have listened to have been quite good. However, the catalog is limited to works out of copyright (or under an appropriately permissive license), so newer material is rare, but many of the “classics” are there.