I am doing data base clean up and have over 18,000 aliases that are non relevant because they were added in error. I now have to do this individually. I don't understand why this is not an option. You should have the option to change, replace or delete for all global changes.
There are also other areas in the database where global delete is not an option. I have a lot of irrelevant info that just stays because I can't manually delete it from thousands of records. The aliases can really be a problem though because of it complicating searching on constituent records and duplicate constituent management.