There are very little uses for an orange pen. They aren't acceptable for school papers or legal documents, and hell, they're hard to read. That means that if you grab a pen that says it's orange, you really intended on needing an orange pen. I can't name a single reason why you would need an orange pen, but you would need one nonetheless. Then this stupid pen comes along ruining your whole plan. How dare you, good sir?
I recently went to Staples for some random office items and they had a sale on 500 pens for $9.99. Now I'm rolling in pens. It's incredible. I just throw them away and lose them on purpose now. I might as well. I have 500 to burn through. I'd be so upset if they were all orange though.