I was banned from asking questions on Stack Overflow because many of my questions have a score of 0. I really think that is too much. What should the beginners do? Where should they ask their questions? Will it harm you to help the beginners?
You need to improve the quality of the questions you are asking in order to avoid down votes and the possibility of an automatic ban. Writing questions like "I have error and I don't know why" are a sure fire way to receive down votes. Try starting your question with the problem you are attempting to solve, what you have done thus far and what errors you are receiving, instead of the other way around.
For example, your most recent question with down votes starts "I have no idea why, but if I fill both of the fields it writes "success". It doesnt metter what I write in the fields. In the user database I have the id, username, first name, last name, email and password." This is a horrible start to a question, as we have no idea what you are talking about from the beginning.