:facepalm: play morrowind that way you will understand why so many people do not want them in
I did play Morrowind, and I detested the little demon flying things. But to not buy a game, because such a creature was in? Its pretty lame no matter which way you look at it. They're cliffracers, and they would get the final laugh on a lot of you. Being afraid of spiders and modding them out is one thing, but this is just something else entirely.
As for lore, having the east side of the map home of the cliff racers, and having no dragons go in that area wouldn't hurt lore at all. Skyrim is home of the cliff racers if we're talking lore here if I am not mistaken.