You thought they were above that here? LMAO! Most people I've seen here seen worse at being open to others' opinions than most sites. =/
I'm not sure why it's allowed. To be honest, it almost seems like it's only allowed because a lot of important people do it. The majority of people on the site aren't against it, or don't want to admit that there's anything shady about it. It's kind of like the whole RNGing thing in general, really. The people who did it weren't against it, and as more people began doing it, it became widely accepted.
Honestly, I think the hacked parents thing is a matter of opinion, too. Even if it is technically against the rules to use hacked parents, I don't know how they could really strictly enforce this rule... There's really no way for another person to tell if you used a hacked parent, as long as the baby itself is within legal parameters (ie. doesn't have an unreleased DW ability or impossible egg move combination or something).