We shouldn't have been giving people handfuls of antibiotics for common ailments.
Porn, for the negative sexual effects some seem prone to when using heavily.
Not getting enough sleep.
Sitting for hours on end.
I hope it's not WiFi.
Giving babies iPads.
Looking down at your phone all day is doing wonders for your back and neck
Social media. When used the wrong way, it literally becomes a drug to your brain. There will be negative effects for those who overuse these outlets.