It's a bit like in the 1960s and '70s when musicians regularly ended up in serious tax debt because they genuinely didn't realize that they should file proper r

It's a bit like in the 1960s and '70s when musicians regularly ended up in serious tax debt because they genuinely didn't realize that they should file proper returns. "I'm just a guy who shows up, they hand me some cash, and then I go up on stage and play my guitar. Why do I need to read up on accounting?" Some software developers are in that state of naïveté about the data they collect about their users. Even if it's just a blog, it may be collecting and storing data about readers in many different ways: ads, tracking pixels, comment logins, etc.