Focus During Workout

What's one of my many pet peeves? People on their phones at the gym. I'll be running on the treadmill and the person next to me will take an incoming call and talk for a good 20 minutes. For starters, you can't get your heart rate up and secondly, you are in no way, shape or form focusing on your task at hand... to workout! The worst is when I see people doing squats while texting. Multitasking is not always a good thing and it's a very bad thing at the gym.