Do videogames ruin plasma tvs?

Ok so here's the problem. My roomate bought a samsung plasma tv, we set it up in the living room. I own an xbox 360 and play video games. Lately I play video games when I get home from school for about 1 1/2 - 2 hours. I don't play daily maybe only 3 days a week. She says that if I keep on playing I will ruin the tv and and the game will become imprinted to the screen. I honestly don't believe that would happen unless you play videogames 24/7 or leave a game paused (burns image to background). What do you think? Will it cause any damage? Please answer ASAP!