I see no reason that a person should be penalized for being gracious and thanking those who helped them. I suppose one could say "Bah! No new information content, so it's a waste of time and space." I don't agree, because providing positive feedback (beyond a ++) encourages people to answer questions.
I see that this has been discussed before at Increasing the Signal/Noise ratio of PM, and that most of the responses were positive towards thank-yous (especially if they added new information, but even if they didn't).
In reply to On Thankfulness by tall_man
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