It is unrelated to my current comic, but the most annoying comment I got happened at an anime convention when I was selling hair clips that I had made.
The clips in question: Angel wing hairclips (Gaia Online...that is how long ago this was). I carefully sculpted them to clearly be a matching pair that would sit on each side of the head. The pieces that went up for sale were resin-cast replicas because they were lightweight and durable.
A young woman walked up and scrutinized my clips. She took one of my business cards and I thanked her for stopping by. She gives me a look and says, "I can make these myself." I wished her luck in doing it.
A week later, I get an email from her. She wants to know how I made a mirror copy of the hairclip because she could not sculpt a matching pair, so I must have a special technique. I tell her that there is no such technique that I am aware of, and she will simply have to work to make both sides match. She got mad at me for hiding an easy technique, and told me that I was full of crap.
It is such a silly situation for such a trivial thing, but I still wonder if she ever figured figured out how to get her mirror copy without sculpting it...and I am still a bit miffed over it.