Sometimes I wake up the tablet by touching the screen with my finger. Sometimes I pick it up and inadvertently touch the screen. Sometimes I tap an applet and the stylus skids. Maybe I've gotten used to it, but my applets don't move as often as they used to. But it still happens.

I know, I know:

Patient: "Doctor, it hurts when I do this."
Doctor: "Then don't do that."

But if some people, especially new users, do it, then it does drag down the user experience.