Don't assume: the original poster is not the only one reading the answer
I would not want to assume that a stranger is aware of how to handle high-voltage circuits.
A key feature of Stack Exchange is that the Q-and-A's are intended to be kept available for the benefit of future readers. Even if the original poster shows awareness of the hazards, one cannot ...
I think we should try to minimise our site's casualty rate. Scary bold warnings at the top of answers, and just before dangerous parts of how-tos is within our ability, so I think we'd be stupid not to use them.
Modern people probably aren't used to televisions and monitors being deadly weapons of deathly death.