Actually, it's ONLY considered SHOUTING by those who FEEL GUILTY concerning their INDEFENSABLE POSITION/IDEOLOGY.
Other than that, ALL CAPS for certain words are used to emphasize a certain POINT.
(...........TONGUE SOMEWHAT IN CHEEK............)
My rule of thumb is IF it's JUST a word or few in a comment, then I take it as EMPHASIS.......HOWEVER IF THE WHOLE COMMENT IS IN CAPS.............
THEY IS SHOUTING!
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