@Douglas: please don't do what you are requesting the moderators to do. Remember that this is a Q and A website, and it seeks to document questions and answers is a way that is easily searchable and useful to other people besides just the OP and the answerer. Deliberately removing content from the site due to a (personal) dispute you have with another user can be interpreted as site vandalism.
You are of course free to ignore any user's questions in the future. But retroactively doing what you are doing in spite is something I think should not be done, and is something that warrants a warning.
In general, I am not going to go around policing and asking people not to delete their questions or answers: people have all sorts of reasons for doing so. But let me just say this now. If it becomes clear such deletions are done in bad-faith (not for improving the content or presentation of the site, not to remove irrelevant comments and answers, but actually resulting in the site being less useful for everyone else) (which you have freely admitted above), the moderators may view the action as grounds for suspension.
For the time being I'll overlook what you've just been doing: the fact that those answers you removed have not been accepted can be a justification for removing them (that the OP, and presumably other readers, do not find it to be useful). But if your answers have been genuinely accepted, then there's relatively little doubt that removing them will actually remove useful content from the website.