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Policy does not prohibit users, including both registered and anonymous users, from removing comments from their own talk pages, although archiving is preferred. The removal of material from a user page is normally taken to mean that the user has read and is aware of its contents. There is no need to keep them on display and usually users should not be forced do so. It is often best to simply let the matter rest if the issues stop. If they do not, or they recur, then any record of past warnings and discussions can be found in the page history if ever needed, and these diffs are just as good evidence of previous matters if needed. talk "