1,2 and 3 have been discussed here many times. Do a search.

4. Intuit employees post these and have somehow locked them. What would you want to say? You can start a new post and include a link to the Tax News and Updates post. Generally I don't find them useful and feel no need to comment on them. I have done this "start a new post and include a link to the Tax News and Updates post." when said post contains an error.