That's because you don't see it from the other side, i actually think that kind of rule's ok, you don't have to give them a job but as i said above too many people will select people in their own image and just won't give others a break
Tbh if i was selecting people for interview and someone said in 'personal interests' that they were a spuds fan, they wouldn't be selected, but i could lose out on someone good (i'd still do it though )