Different Stands Out Mug by TET. View on RedBubble . I got to thinking about blogs and the fact that anyone can leave a comment to my posts. When someone comments, the polite thing to do is to respond with a comment under theirs. This may prompt an additional comment but really that person has no real intention of in depth discussion. They're just passing through. It's a lot like walking down the street with a complete stranger approaching from the opposite direction. Your intention is to simply pass them by but as you come within talking distance the stranger says "Hi, nice day isn't it?" Like they needed to share that little highlight of information to brighten your day too. You can smile and nod in agreement, or go so far as to say "Yes isn't it," whilst passing by without so much as a break in stride. It's all that is required to be polite. Sometimes though, you want a bit more from your stranger. Why did they decide to say 'Hi'