For sure, but I probably naively think that those who have the gumption to take the back off a TV would know this. As a kid, I used to play with an old TV by connecting the second anode lead to a 50 ft extension cord and walk around our damp basement zapping spiders with inch-long sparks. Fun times.

My worst shock was from an old tube shortwave receiver when reaching over it and learning that the antenna lead was hot by touching it.