Projection TV's And Game Consoles?

mbadolato asks: "I'm hearing that it is a Bad Thing (tm) to run a game console unit through a projection TV. What are people's experiences with this? We recently got a Toshiba 61" television, and I have a Sega Dreamcast connected to it through one of the s-video ports. I don't play the Dreamcast all that often, but I'm worried that, from what I have heard, it could still be bad for the TV. Any opinions?" This is odd, I would think that if the game console in question was compatible with the signal (NTSC/PAL) on the projector then all is kosher. Could someone clear up this confusion?