The old "live chassis" TV sets in Britain had one side of the supply connected directly to the chassis, but the design was always such that nothing was exposed to touch. Fixing screws holding the chassis in place went into insulating inserts, the control knobs were non-conductive and either a push-fit on the control shafts or fixed with recessed grub-screws which could not be touched, etc.
Many of these sets in the 1950s/60s were fed from a reversible 2-pin 5A plug, so the chassis could easily be hot. The only problem was if somebody messed with the physical arrangements (e.g. replaced a fixing screw with one too long) or if a knob became detached and left a live shaft exposed (I learned that lesson the hard way when I was about 9 years old!).
The half-wave rectifier arrangement on the sets meant that in those areas which still had DC supplies in the 1950s the chassis would
have to be live in those houses fed from the negative pole of the 3-wire distribution system.
The SMPS arrangements of modern TVs do indeed result in the chassis sitting at about half supply potential, no matter which way the power is connected (just one of the reasons for using an isolation xfmr for servicing).
In a real world situation, you have two wires from the telly. Is there any way you can wire them so that an immediate danger arises in a properly wired house?
Certainly nothing that would blow up the TV!
Reversed line and neutral = No problem.
Connected between neutral & ground = TV just doesn't work.
Connected between line & ground = RCD/ELCB trips if present, otherwise TV works using the ground conductor as a path back to the neutral.
There's no immediate danger in the latter situation, although a bad ground connection could result in the metalwork of other appliances being pulled up to 240V by the path through the TV.
