Have you ever published a photo somewhere (Flickr, your website, blog, etc…) and some one emails or comments to you and asks “Why’d you shoot that photo at f/16? Don’t you think f/11 would have been more appropriate?”. Or perhaps you’re delivering them to a client and you simply don’t want them to know all of the camera info (maybe you got a killer shot with a point-n-shoot but you don’t want them to know it ).
I call them Metadata Creepers. They creep into your images that you unknowingly posted all of the metadata for and look through only to ask you semi-irrelevant questions. Well there’s a way to automatically get rid of your camera info. When you go to File > Export and the Export dialog opens, you’ll see a small checkbox called “Minimize Embedded Metadata”.

Turn that on and Lightroom will keep any copyright information in the metadata but it’ll remove all of the camera-related stuff.