If you're in the EU or California you can request they anonymize/erase personal information they hold (some info is exempt) via the form linked at the bottom here: https://help.bungie.net/hc/en-us/articles/360049024632-Contact-Form-Data-Privacy-Requests Outside of those 2 regions you can't. As part of the process all of your linked accounts will be given an irreversible permanent ban for Destiny 2 (and potentially all other Bungie services). Bungie will not consider any appeals for it if you regret the decision later on.