Lanefan
Victoria Rules
Those examples both sound like a DM describing the setting and-or background; this is fine, and it's up to the DM how much detail to provide.Similarly, the level of details in the descriptions is often largely unneeded, and it can make a huge difference in the offensiveness. Saying "the evil dragon has raized many villages looking for children to eat" or "the orcs torture their prisoners" is one thing, but adding descriptions is another.
But when the players decide to get into detail about what their characters are doing with (or to) each other that's a different realm, and up to the players to sort out.
Lan-"sometimes a DM has no alternative except sit back, shut up, crack open a beer, and wonder what's going to happen next"-efan