I've edited my comment for clarification, because KYC might've been an overstatement here. Perhaps "compliance" with a financial institution's due diligence process to support their KYC obligations; it having a trickling-down effect. But like I've said in my now edited comment, the excessive detail gathered by ticket providers, seems to primarily serve marketing purposes. And although there might be nothing legally stopping one from providing false information, the provided information might be passed onto a third party (Google with reCAPTCHA being an example), comparing it to entries provided to other websites: detecting anomalies and returning a risk-score relating to mitigation steps (additional challenges, denial of service, or follow-up contact). Over the counter ticket sales for events I'm attending are practically non-existent, and door-sales are not providing any guarantees, besides also being extremely rare.