The number one open source intelligence source that people with evil intent will try to use against you, or to identify you, is your social media profiles.
Dating site username search Guysex
If that professional headshot is still in a cache associated with your dating profile, he or she can use Tineye to match it to your corporate bio that shares the same photograph.
If you’ve changed your username, he or she may be able to find the previous version.
Give some consideration to how much information you’re giving other users over time and as a whole.
Did you post that you live in Milwaukee, tell a user that you live in an apartment with a pool, and tell another that you live next to an airport?
A few years ago, image recognition on a large scale was restricted to law enforcement and corporate security. Free services like Tineye and Google Images will search billions of indexed images on the internet for identical or similar pictures.