If you're lucky, that is. I take public transit daily, so I get constant reminders of the abysmal state of many people's social etiquette/skills.I think it needs eye contact. The guy next to you isn't looking at you constantly.
Edit to add my other thought: as a Subaru owner, I instantly wondered whether the name EyeSight was actually up for grabs, given its use in their cars for over a decade...