Surprisingly couldn't find any such thread aggregating all your "interesting" surprises in consumer electronics...
Let's start with today's find:
Someone may need a soldering course and probably a little less caffeine (see melted piezo). It's an RC charger sold under a pretty high end brand, very clean-looking unit from the outside etc. That's the 12V supply, with obvious reuse of a 2-wire mains cable.
Cutting component leads is also apparently overrated, those 3 are from a TO220 MOSFET on the other side.
Unit was in from a friend for repair as broken / doesn't power up, but apart from the dodgy manufacturing I couldn't find a fault, cleaned that up and it seems to work fine. The botched wires
could have caused a short depending on how things flapped around but it doesn't really look like there was enough leeway...