I could hazard a guess that if someone made your phone really hot it would be able to be scanned by thermal imaging and pick you out of a crowd. Just leave phon

I could hazard a guess that if someone made your phone really hot it would be able to be scanned by thermal imaging and pick you out of a crowd. Just leave phones at home, like, use 18th century methods if you have to. I dont pretend to care or know why people would be interested in this, but like, your phone probably is not your friend in a protest