I'd bet it is, because I did the same (in a 240V country). I knew it wouldn't end well and did it anyway because, I guess, as a kid I was used to the world not letting bad things happen so didn't really believe it would. There isn't a switch on the toaster or TV that bricks it after all.

Anyway got a spark and the magic smoke, and bought a new PSU from a guy at school for $15.