Its no mistake I think I found it, I saw this thread yesterday wanting to learn more about my iphone.
I have an Iphone 6s, and this is how I did it: step one say "hey Siri" , then I followed by asking her " look up money one fcu facebook page,"
I got many links, and clicked the one that said facebook she proceeded to open the webpage and I pressed the home button with my pinky and my phone was unlock. I was not able to do it over and over again. Just once.
When I tried to do it over and my phone started showing less facebook links, and what ever I asked the phone it would ask for the passcode if I wanted to open the links, I turned off the phone and turned it back on and Siri would not listen to me. She would only talk to me after I've unlocked the phone at least once.
I think jnachez should be fine. unless someone happens to find a way to replicate the results over and over again.