It isn't fair to the community when you delete your entries. We operate on the principle that, although you might have started a post, the discussion belongs to the entire community, not just you. This means that you don't have the right to stop it or delete it unless you have a very good reason. These very good reasons are rare.
1. Please don't delete your entries. If your question is answered and you don't want any more comments, edit your post to say thanks and change the comment settings to no notfication. If you made an embarrassing gaffe, suck it up and deal with it. Note that deleting your posts to cover up embarrassing gaffes is a bannable offense here.
2. Please tell me if you notice that an entry has been deleted, especially if you think it's because the poster was attempting to shut down discussion. Screenshots are a bonus. This will help me take action against the poster if necessary.