I agree that the average MCR fan in the 2000s probably wouldn't have heard of SDRE (likewise for Coheed & Cambria- are they really even Emo?), but it's it is a comedy show, not to be taken seriously. and there's no point getting your knickers in a twist about it. There's also an episode with Slayer, who they referred to as 'Death Metal'. No-one complained then!