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.
Alternate Character Interpretation: In-Universe with Mr Black. Everyone thinks that Mr Black is a BadassOlder Than Dirt wizard who has a very twisted sense of humour and thus likes to play "pranks" on the Law Enforcement officers he meets, such as dropping Death Eaters into a cell while he is being given a tour, and also uses Obfuscating Stupidity to deal with LEOs that are shadowing him. Actually, Mr Black (Harry) is just as surprised as them whenever Death Eaters appear next to him in increasingly weird situations and does not even know people are tailing him at all.