Make those playlists explicit if we can.
Find all tracks w/o explicit=true and do a search.
Fuzzy compare with all tracks found that are explicit and if close enough (fuzzy compare > tolerance) add to list.
Replace if user is all good with it.
Thanks to fuzzyset.js, handlebars.js, spin.js, fancybox.js, and jquery.js for doing the hard work.
And spotify for their stylesheets.