One of our jobs as moderators is to keep the site clean. This includes deleting posts that do not belong for one reason or another. This usually involves leaving a comment about why the post was deleted, then deleting it. Deletions are not necessarily permanent as an OP may edit them and ask to have them un-deleted.
Common candidates for deletion include posts that are not actually answers to the question or are very low quality. These are usually brought to our attention by the community through the use of flags. Sometimes the choice to delete is very obvious: the answer is a troll or flame or is on an unrelated topic or not even in English.
Today I deleted several posts that were basically variants of "Islam believes X instead" because they were obviously not relevant to the focus of this site. However sometimes the line isn't quite clear. We often get content from people who label themselves as Christian (which per the site definition is valid for anybody to actually do) but then go on to express views that are clearly not Christian and to my knowledge are not representative of any segment of Christianity.
Usually I just leave these alone and let the voting system take care of them. We have quite a collection of such answers in the more-than-ten-downvotes side of things.
Sometimes edge cases come along where it's not quite so clear. For example consider this answer:*
The view that there is no God except as the figment of men's imaginations is patently non-Christian, yet it makes a pretense of defending itself as a view held by "some" Christians. I could easily deduce from the voting and comments that the community generally agrees that this view does not represent Christianity.
The question here is, should such edge cases be deleted? Should this site be cleaned up so that only answers that garner some level of acceptance from the community here survive in the long haul or should heavily downvoted/low quality/not representative answers eventually be deleted as well?
* Please don't make this thread about this answer in particular, I would like to know how the community feels about cleanup of answers in general.