That's an impressive list, isn't it? :) I'm not insinuating that I didn't deserve any of the downvotes. I'm not suggesting that the person responsible did not have any good reason for not downvoting. What I am saying is that this person, (who no longer has an account in ELU or in ELL) systematically and deliberately downvoted my questions and answers anonymously. And because his account has been deleted I know exactly who the user was, which makes the downvotes that more unpleasant and sadder. And I swear if he had once or twice indicated why my answers or questions were weak, I would have listened to his criticisms and have adjusted my answers accordingly. But he never did.
Once, confidentially, when I was unaware of his duplicitous behaviour, I even asked him why I might be receiving so many downvotes. He said I sounded too arrogant and lacked humility. Well, that was a shock. But I listened and thought maybe I do sound like that. Maybe the voice which I hear in my head while I'm writing is different from the one others hear. Nobody wants to be disliked, even if it's on the Internet; it's a fact. Consequently, I attempted to soften my comments especially on Meta, and tried to be more diplomatic. Funnily enough, things improved a bit, and I thought my "advisor" had given me some sound advice. Ha! (That's an ironic "ha!" by the way)
Encouraging people to explain downvotes
I would have written an "answer" but I haven't nor ever will, earn 10 rep points, on this site so, I have to make do with a long comment. I read one suggestion made by mg1075 who might be onto something. What if instead of [earning] a badge, as he suggested, for every five downvotes with no comment you lose five rep points? Cont'd. – Mari-Lou A Sep 17 at 7:32
Cont'd ... This will still allow leeway for: 1. You just want a quiet life and no hassle. 2. to explain why would take too long. 3. Your downvote is confirming the general consensus that an answer is incorrect. 4. You're in a mean mood. But on the 5th consecutive downvote you would need to make a constructive legible criticism. Anyone who writes a mangled comment would be immediately spotted and be flagged by the community. I'm not sure if this idea has already been suggested, so apologies if it has been and was rejected.