There seems to be a lack of consensus on when a question or answer should be deleted and this frequently leads to conflict on the site. We should discuss the issue clearly and reach a clear policy. We can then use it as a guideline for users who can vote to delete (moderators and high reputation users) and as a reference for users whose questions gets deleted.
If you think a category of questions or answers should be deleted post an answer explaining the rational.
Try to be specific about the categories so we don't run into disagreement over their interpretation.
Any post that doesn't fall under the general SE rules (i.e. they would be deleted on any SE site, e.g. advertising spam) or the ones agreed in this discussion should not be deleted.
Keep in mind that deleted answers and questions can still be edited. If your post is deleted and you think you can fix the problem then edit and flag for moderator attention. If you need feedback on how to fix your post you can ask for help politely on the meta or in the chat room.