I think everybody who writes HTML, CSS and JS for a living experiences this. For me it's the never ending jokes about "JS was written in 9 days" and remarks on how easy it is to fix a problem, because "it's just CSS". I compare it too subtle discrimination. I am a white male and I won't pretend to know how it feels to be discriminated, but I do know how it feels too fight the uphill battle of condescending remarks. And I also play my part. I downplay what I do ("I build websites"), because I don't want to hear myself pounding my chest.