How far back are these "ethnicity estimates" supposed to go? Are we not all basically African?
If we start excusing the discrepancies between the estimates and known paper trails with references to migrations 1500 years ago, then why is there any distinction made between British/Western Europe/Scotland/Scandinavian etc in the first place? The demarcations are extremely unreliable and is the most misleading (if not deceitful) part of this DNA testing business. How can they legally get away with being so inaccurate?
In 50 years time, future genealogists will laugh at our gullibility and compare us to previous times when everyone wanted to find an ancestor in the Bible.