You spend more time at work than nearly anywhere else in your life. You spend more time with your coworkers than nearly any other group of people. Why wouldn't

You spend more time at work than nearly anywhere else in your life. You spend more time with your coworkers than nearly any other group of people. Why wouldn't you pursue someone if they show mutual interest? You just have to be more careful, more respectful, and use more tact than if you had met someone in a bar (though personally I'd adhere to these regardless of circumstance). If you're not sure how to approach it with these general principles, then it's probably best to stay out of it until you're confident enough in yourself. You also have to realize that if it doesn't work out, it'll be harder to break things off cleanly. But to rule it out altogether? That's a bit extreme.