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.
Foe Yay: Happens sometimes between Tosca and Scarpia, especially if the latter is a tall, handsome Badass Baritone. In fact, Maria Callas, one of the most famous Toscas, talked about how her character is attracted to Scarpia despite herself.
Franco Zefirelli came to the same conclusion, as shown in his 1985 interview concerning the MET Tosca.
What an Idiot: Cavaradossi hasn't said anything the torture room but when he's brought back, he sings something like: "Down with the tyrants!" right into Scarpia's face. Nice job, Mario, now Scarpia has all evidence he needs to have you executed for treason!