Eating habits in the modern world

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We are all aware of the impact our diet has on our bodies and in some cases, even our minds. But how much does that awareness actually affect our habits these days?

Today, we hear many different things about what's healthy and best for us. There's the usual rule of three meals a day that many people grew up with. Then, we started following the advice for weight loss - more, but smaller meals. Then alternate day fasting, and so on.

It would be hard to make a decision among all of those theories, even after research. 

But then there's the fact that we are always in a hurry. Today, you just don't have the time for everything. School/work, social life, love life, sleep... And there isn't much time left to dedicate to what we eat. 
We don't have the time to plan and prepare a healthy meal, we sometimes don't even have the time to eat as much as we should, and then we compensate with a binge-meal once we have the time for that.

But how does that affect us in the long run? When does it stop? Do you think most people learn to slow down on their own, or it takes a health issue to change their ways?

I'm sure that irregular eating habits that include unhealthy food (and of course it's easier to eat an unhealthy meal - you just pick up a sandwich, a hamburger, a bag of fries, etc. and go) can't affect us in a good way, but how bad is it really? I'd like to hear different opinions.