Ohm

A trio of American vegans wearing sandals and ohm t-shirts spent several minutes haranguing the Italian waitress concerning the food. 
They slid comfortably right past rude into downright insulting. 
Eventually the trio ordered burgers and fries. 
They settled into loud debates about whether or not dogs have souls, all the while assiduously keying their mobile phones and paying only limited attention to one another. 

If those guys want revelatory insights they might want to unplug first. 
The waitress was notably annoyed and despite three ohms not one guy had the compassion to notice what was right in front of them. 
Egostentialists?