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.
Adaptation Displacement: The movie and musical are much more well-known than the play "I Am A Camera" and the original stories by Christopher Isherwood.
"Funny Aneurysm" Moment: Natasha Richardson played Sally in the recent revival... and her singing "From cradle to tomb isn't that long a stay!" has become a lot harsher given she died suddenly and tragically a few years later.
Misaimed Fandom: "Tomorrow Belongs to Me" is popular among neo-Nazis, who are either oblivious to or don't care about its origins, and several racist or neo-Nazi bands have covered it.
From the other side, some people don't quite realize exactly what it is about and think its just a general "let's do our best" song, which leads to people singing it at concerts and what have you. It doesn't help that it has a pretty cool rhythm.
Nightmare Fuel: the reprise of "Tomorrow Belongs to Me," when just about all of the guests at the engagement party begin singing along. As Fraulein Schneider later says, "I can no longer dismiss the Nazi Party. Now they are my friends and neighbors."