We've all heard it. "My iPhone is listening to me and serving me ads." We've all been suspicious that it has, and we've all snapped ourselves out of believing it. I've been keeping a log, as it's been happening to me quite a bit with Twitter, where I'll be served ads (usually) two days after I have a conversation about something I've never spoken about before. Today was by far the creepiest one. The other day, my friend and I were driving under the Bay Bridge in Oakland. He started telling me about how they recently started using security robots to police the underside of the bridge and prevent trespassing. We talked about it for approximately two minutes or so, and about how robots will take over jobs like that in the near future. Today, I was scrolling through Twitter. What ad did it serve me? "Invest in the future of public safety with autonomous security robots!" Creepy, right?