Do you think you do/behave differently if there is an audience?

I am starting this blog and I feel like I am not sure I want to tell anyone I know about it so I can write without care of judgement. Then I asked myself then why, for petes sake, would I write it in a open forum on the WORLD WIDE web??
So do I secretly want it to be read by those that know me or do I just need to know that I have been/my thoughts witnessed by strangers who have no context of my actual life.
IS this a “if a tree falls in the woods?” question.