Yeah, I guess so. But I found a pic of Lyn-Z from Kerrang I believe, saying that she finds it offensive when people call her "Mrs. Gerard Way" but then again, I can understand why be gets a little annoyed.
Nah, don't even worry about it. I've been a fan of theirs for about nine years (I feel old, even though I'm only twenty, now - really, it just means I was listening to them at an age where I probably shouldn't have been listening to them, being an impressionable kid, and all...) but I sure as hell don't care when newer fans get into them because of the MCR thing. (But then, I might be biased, since I also love MCR, though I've only been into them for a few years.) I honestly don't think the band cares, either. Why would they? They get a little more fame, more fans, and more awesome shows out of it. XD