Is there a way to force one or more (specific) metadata fields to be blanked/deleted on adding a book to the library? For example, when I'm adding a book, I do NOT want someone else's/some ebook store's star rating or tags at all. As it is, I manually delete these fields every time... which is a pain when adding a boatload of books at once, since there's no batch-process way that I've found (and I'm not suggesting that would be a good idea!). The same goes for the date (of adding) field.
Instead, a tweak/preference that substitutes a null set for a field on addition of a book would be great. So would any other method that just trashes metadata that is far more often misleading (for my uses) than helpful.