After some cases earlier this year, we don't permit spec work or design contests here at MacRumors. They are exploitative and attract too much adverse comment from professional designers.
Ohh I read that post on No!Spec, I was really surprised about those things. It just made me realize how my corporate job (only graphic designer) does all the no-nos from there. Good site to look into when you feel something weird on such cases.
Although Blue Velvet, we can have sticky post on MR Design 101 type of e-course? Just an idea.