I have celiac disease and it annoys me to no end that people who do not have it choose a gluten free diet because it's a trend! Most of the time people actually think I am only trying to follow the trend when I ask for something gluten free.
Gluten free foods are insanely expensive because manufacturers and grocery stores know it's a fad and they charge anything they want to make a profit off this trend. They are actually even more unhealthy than the 'regular' over processed versions.