[CarolynSpencer]

I have actually thought of the same idea dozens of times.

I feel like the thought isn't that far out there, but obviously privacy and security issues come to mind, as mentioned in the article.

Personally, I do use my domain name on as many platforms as possible; it not only helps with SEO to ensure that people are finding the correct person, but it also helps to better manage my digital brand by ensuring that anything that could possibly have my name (or "ID") in it can be controlled by what I post, upload, tweet, share, etc.

I see using a domain as a unique ID as a digital brand management strategy (and a good one at at that).