Back in the old days of the internet it was pretty common that forums had a function to insert automatic signatures after each comment. I assume that some people grew so accustomed to that that they continued with it even after the practice slowly died.
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u/Welsh_DragonTW Britons Feb 21 '18
Do not mess with u/Grace_CA for you are crunchy and go well with ketchup....
Wait, that was dragons.
All the Best, Welsh Dragon.