These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Covered Up: In a rare case where this was done almost purposely; Buzz Osbourne asked the members of the band Green River why they didn't play the song "Leech" live anymore. They replied that they didn't like the song much anymore. When Buzz asked if the Melvins could cover it, Green River apparently flat-out gave the song to them.