This sort of behavior is considered anti-social and is generally unlawful and I would recommend that you do not do that.

Suit yourself, but you're missing out on the best part!

I could understand this if you were busy working, and someone randomly approached you. But from what I understand these random conversations happen more in a break area. So are you the type of person to punch someone in the nose if they say hi to you and enquire into your general well being, while you are getting a drink at the water cooler?