This is what I thought the instant I saw "age, country." None of that shit is needed for anything.>>1361362
There's a few government agencies, interest groups, and general 4chan users who literally sit around all day looking at 4chan posts trying to identify individuals and keep track of them. The lucky ones are getting paid for it. 4chan has always been a place where only the foolish or plants give out info.
Data mining, face recognition, & OCR technology are also extremely powerful even in the civilian sector. Most boards have multiple archive backups websites across the internet with tools specifically tailored to link people and posts together.