a self-fullfilling prophecy, or is there really something to the "don't look at yourself in the mirror in the dream" thing?

I ask because as I read this forum I've come across quite a few posters who say looking into the mirror in a lucid was scary/disturbing. I've read that people saw their mirror image as deformed, that they looked normal except their eyes turned black (which sounds more than a bit scary to me), and other similar things. What I'm wondering is, is this just happening because people read of other's experiences, and thus have that mindset that "looking in a mirror in my dream might be scary", so when they do - it happens.... or is it at all possible that there really is something (what kind of something? I have no idea, that's why I'm asking) about looking into a mirror in your lucid dream that generates negative experiences. Could we really not be "supposed" to look in a dream mirror? As a realist I want to doubt such a thing, but the experiences on this forum make me wonder.

How many folks here have looked in a mirror and had nothing scary or strange happen at all?

As for me personally, I'll be avoiding mirrors in my dreams for the forseeable future.