I think it sounds as if the sayer feels superior to the person they are addressing. I admit to having thought it about people but don't think I would say it to them as it would offend although I might suggest things they could do which would give them a life.
Perhaps it applies also to the nit-pickers on GN? What do others think?
No wonder our prisons are full
Write a word that begins with the first letter of the user above you


So to me being told to "get a life" was a good thing.
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