It makes me so sad when people do that
I've heard it a few time with border collies. They have no off switch, ALL THEY DO is stare and become obsessive, they're impossible to live with, ZOMG THEY HERD EVERYTHING, etc, etc. It's funny, because I find Rory really easy to live with... and every BC I've met has an excellent off switch when they get enough mental stimulation.
I've heard chihuahua owners complain that their dogs are "yappy" and "hyper." My chihuahuas only bark when someone is right outside the door- Rory is MUCH more yappy than all of my chihuahuas combined. Emma, Tucker, and Chloe do have high energy levels for the most part, but settle down easily. They're not hyper or yappy- if you DO THINGS with your dogs and GIVE THEM ATTENTION they're so much different.