Prolly cuz they dont wanna have to get ready for work. You know how it is, if one person starts getting dolled up, everyone feels the need too. But if everyone just throws on a little mascara and some pressed powder, it's ok.
Personally I dont see whats the big deal. Look at Nancy Grace, or some of the other women on the national news. They ALWAYS have fab eye makeup on. I've seen Nancy wear Pinks, Purples, etc...
If Nancy can wear, so can I LOL.
I had Electric Eel on as a liner today with a sheer blue on my lid and shooting star blended in the crease, and all I got was compliments. But a lot of the girls in my office wear color, so I guess it's a little different.