“Now, I’m 16, and I’ve been able to reflect on how I got sucked into that void—and how others do, too. My brief infatuation with the alt-right has helped me understand the ways big tech companies and their algorithms are contributing to the problem of radicalization—and why it’s so important to be skeptical of what you read online.” FastCo: I became part of the alt-right at age 13, thanks to Reddit and Google.