Is it weird of me to refer people online (or even strangers in real life) as Uncles/Sir or Aunt (y)/Ma'am? Generally to people elder than late 20's?

You must have noticed that I call elder people to me as Uncle, Aunt. If they are not the Frank type then I call them as Sir, Ma'am. Is it weird to call people online as Uncle or Aunt? Because generally they became Uncle or Aunt figure to me once they are close to me. My cousin was going through my account here and noticed this. He laughed and said it was weird.

To those whom I referred as Uncle or Aunt, how do you feel about it?
Is it weird of me to refer people online (or even strangers in real life) as Uncles/Sir or Aunt (y)/Ma'am? Generally to people elder than late 20's?
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