Like how we all used to believe that Bitcoin was anonymous?

I was pretty careless in my early years and I'm thankful I managed to avoid KYC for the most part. I'm not sure when my "lightbulb moment" was exactly. I had significant funds on BTC-e when they were shut down in 2017 and I remember becoming really paranoid about taint when we got refunds. I started looking into mixing and Coinjoins, and eventually realized that our privacy problems actually go much deeper than just blockchain analysis. One of the scariest problems today is web trackers and third parties leaking transaction data and other PII.

Combining previously unrelated wallet inputs is just the tip of the iceberg, but it's something I think newbies should start thinking about.