This is today’s edition of The Download†our weekday newsletter that gives a daily dose of what’s going on in the world of technology. The people who use humor to troll their spam texts Recently I received a mysterious WhatsApp message. “Dr. Kevin?” it started, the question mark suggested the sender felt bad for interrupting my evening. “My puppy is very sluggish and does not eat dog food. Can you make an appointment for me?” I was stunned. My name is not Kevin, I am not a vet and I was not in a position to help this person and their...