We already know who his wife and grandchildren are, so it doesn't strike me as particularly dangerous to have the ability to see what the article describes as fewer than ten of Biden’s contacts. The man has been in public life for about 50 years, so presumably there has been ample time to collect information on him. Knowing his venmo ID and contacts doesn't necessarily carry much information that would empower a malicious actor. It's an interesting story for sure, but "privacy nightmare" is a stretch.

As long as you use venmo for transactions that are publicly defensible with connections that are publicly known, and you ignore all payment requests, what are the risks of keeping an account as a public figure?