Some of the heads look indeed rather disturbing looking, however, I also think the size could be an issue. If your head is smaller, then you can (easily) put some stuff in it (like foam) to make it fit better, but if it's too small, that might be a problem.
hehe.
But it would be an ok idea I suppose. Then again, you can easily go to a costume shop (if there is one closeby, that is, or reasonably closeby) or something like so and try any masks on instead.