The act of a person, or people, harassing you because of your choice or preference towards a particular type or brand of technology.
Ignorant douchebag #1: "I can't believe you bought an iPhone, you know they're inferior to an Android phone in every conceavable way!"
iPhone Owner "Hey man, that's Techual Harassment. The iPhone is a great phone".
Ignorant Douchbag #2: "Dude, why do you have Windows Vista on that machine? You know it's, like, bloated and less secure and stuff".
Windows Vista Ownder "Hey "dude", stop techually harassing me, I don't appreciate it".