Why update strangers?

I am not sure what makes me update everything that happens around me to everybody. I take sometime everyday to update what has happened in office to my roomies (Konda, Gopal & Arasu). What better thing can I do to waste time? I don't remember how I picked up this habbit. But, I want to control myself from uttering every non-sense that happens to me. I am not sure what they feel when I start telling them the non-sense. It must have been pretty tough for them too.
I made a mistake of letting one of my colleagues to know few things. He went overboard to comment infront of my other colleagues. This reached intolerable limits and I started to realise my mistake. Result is the post here. Anyway, I started to ignore him. I think I should not let every damn thing to people around me. I remember my friends calling me BBC during PEC days. It is not about letting out secrets. Why tell things that are not required to be told to others? I have to reduce the amount of speaking that I do with strangers. I will continue to bug my roomies for some more time.