Earlier quoted context omitted.
I've learned that people like you exist, and there is an easy way to deal with them. Simply flat-out refuse to engage in a meaningful dialog unless you stop touching my fucking screen. In fact, I'll even get up and walk away if necessary. ("How about we go discuss this at your monitor?") It's not about the expense, and calling it a pet peeve is very dismissive. It's about respect and personal space more than anything…
Damn, now I want to take my pants off and smear my hands across your screen. Honestly, if you started getting up and walking away every time I came to your cube, I'd be there 3 times a day and half of the other people in the office would be in on it and find it hilarious and you'd probably end up in the cupboard crying and hand in your notice. Seriously just say "please don't touch my screen" instead of this hilariou…
I'd just quit, simple as that. If my boss wanted me to stay, he'd make sure you stopped or left. I'm an experienced javascripter in Silicon Valley. Finding a job is not a problem, in this or any economy, and nothing's worth working in a hostile environment. If you were working for me, you'd be fired on the spot for such behavior.
In a professional environment, blatant disrespect should not be tolerated. I'm pretty sure my feelings on this matter are not unusual.