LOL. I can't remember who, but one manufacturer recently started placing their single-entry cable on the right side (controls and all). I personally don't think they thought that one through as only 10% of people are sinister. I also think it's a bad thing that they violated convention. Because left-side entry isn't set in stone anywhere, the only thing that keeps it a de facto standard is consistency (which they just broke). Whatevs, free country and all.
It's rare but not unheard of. The Sennheiser HD 25-1 II has had a right-entry cable for years.