I also had co-workers that laughed at my making notes, labeling folders, and always asking at meetings "What is the goal of this meeting?" I even had a fellow manager making snide comments about how I wasted time by making labels, keeping my in-box clean, etc.
Now, a year later, both my boss and our CEO have referred to me as "the only guy that can get stuff done" (although I think they may have used another word other than "stuff") and the manager that made the snide comments was fired a few weeks ago for not producing. From what our CEO told me during the firing the manager had said "What about Saxon, all he does is make labels all day" and the CEO responded "No, he's the only person getting things done." I laughed when she phrased it that way. I even had to ask her if she's read David Allen because that line almost sounds like a commercial for GTD, but she was clueless of GTD until I explained it to her.
Being busy listening for your co-workers' label makers is one sure fire way of being unproductive. I have noticed, the more I get things done, the quicker I get going on other things. That means more use of the label maker.