It's said that breaking a mirror brings 7 years of bad luck. Fair enough, but are there technicalities? Loop-holes? What exactly constitutes a mirror?
For instance, a mirror is generally considered to be glass with silvering affixed to one side. But what if the mirror is plastic, like on some toys, or even like those used to reflect light from a flashlight? If you smash a flashlight, is that 7 years of bad luck?
What about if you scrape the silvering off the back? Does the glass still count? Or does removing the silvering count as breaking the mirror? Does an object cease to be a mirror at some point, or is it grandfathered?
Personally, I get so wrapped up in stuff like this that I don't even like to break mirrored drives on servers. It's called a mirror, and I don't want to mess with that.