Should we add a point to these quote posts, that before posting a quote you should check there is a reference to it's original source or context? Not necessarily to add to the quote, but you should be able to find it if challenged.

wikiquote.org seems fairly diligent at sourcing quotes, but Google doesn't rank it highly in search results compared to all the misattributed, misquoted or just plain made up on the spot nuggets of disinformation that have gone viral and colonized Googlespace lying in wait to catch the unwary (such as apparently myself).