My biggest trigger for paranoid delusions is any sort of conspiracy theory material. It's very easy for me to get sucked in and start freaking out. I think my worst paranoid delusion episode was about 4 years ago, I was convinced that the government was going to round everyone up into FEMA camps and kill us all, and I was desperately trying to save my family, who did not "understand" at all and would not follow me into hiding in the woods. I wound up having a massive fight with them followed by a complete mental breakdown, and they were absolutely bewildered and angry with me. It was a pretty awful time.