I have been reading this question and answers and I have submitted the answer there which is really a question. I have added it there, because it come to my mind after reading the questions and answers. My answer was deleted, but since I found the "undelete" button I used it. I was adviced by someone to post my question as a question here. I am afraid to do it, because my question will be immediately closed, deleted or down-voted. I am not strong enough to stand such a pressure. One of the administrator has promised to support me here.
(2019-01-29 Today I added it as a question - let's see what will happen.)
Therefore I am thinking whether mathoverflow is good platform for maintaining interpersonal relationship. Here is definition of "interpersonal relationship" from wikipedia: "strong, deep, or close association or acquaintance between two or more people that may range in duration from brief to enduring". In current stage of my life I find maintaining relation between people more important than achieving scientific, technical or business goals.
Using down-voting is bad idea and it may hurt person who ask genuine question. In Polish language we have saying, that "there is no bad question, there are only bad answers".
I know that even this question - here on meta - will receive down-voting, so I am already preparing myself for such a pain. Man is social person and need acceptance from peers. Maybe it was wrong idea to join mathoverflow. I should better spend time talking to my wife or people around instead of spend time on Internet forum.
My requests are:
Move questions to math.stackexchange instead of deleting them.
Remove down-voting. Alternatively down-votes can be summarized in another dimension. Remember facebook originally had only "likes". Now you can also add negative emotions, but they are not summarized with positive ones ! I believe you can see who added "emoticon" to your post there. How many times you can see comment on MO like this: "who down-voted my question", "I have not down-voted your question" .