The best thing you can do is just walk away from people like that. Or better yet, suggest they try using Poser and see how the do. Some seem to think that Poser equals "click and poof..art". Best to not let those types get under your skin. Art is about being creative, be it using dryer lint or newspapers mixed with glue, paints and palette, or Poser and a computer. Unfortunately there are many ignorant and closed minded people out there that think the only type of "art" is that created by paints on a canvass. Too bad for them because they miss out on a lot in life.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi