He said it when he was 19 (!!) in regards to a web form he made where people submitted their emails, phone numbers, and social security numbers with nothing else besides that form. The users were indeed stupid as shit in that situation.

I'd also like to remind you that he's 29 now and running one of the most successful companies in the world. If you think he hasn't learned something in the span of 10 years, you're delusional and your comments as well as that article is sensationalist.