DEF CON 2018 Last year, DEF CON took place from August 9 to August 12. What did traffic from Las Vegas look like during the month of August? Let’s look at Stack Overflow traffic as a proportion of US question views as a whole, and also look at another city for comparison. The scales on the y-axis are different so that we can see weekly variation in both cities. Well, that is pretty clear, if you ask me. See that big spike for Las Vegas on August 9 – 11? There is about a 50% increase in the traffic we see from Las Vegas during the days of DEF CON (at least its first three …