Please note that AnnounceKit is SOC2 and GDPR Compliant

Yes, you can.

If your user data is sensitive, removing the identifier properties like user: name, user: email, and user: id while configuring User Tracking would be the best way to anonymize the user data.

However, since the sync of seen announcements will be broken if the user: id is removed, you can use the hashed identifier properties (md5([user: id, user: name, user: email])) instead as user: id.