I've never crashed a wedding. When I was a kid I, of course, used to crash parties. Crashing a wedding is difficult though because you have to have the suit, and you have to have information in case someone catches you. You have to know at least some names and something.
The Google algorithm was a significant development. I've had thank-you emails from people whose lives have been saved by information on a medical website or who have found the love of their life on a dating website.