The Dispatch is a tabloid not known for ethical journalism. If you believe that Hwayoung is solely responsible for that debacle years ago, you are as naive as the one ones who thought she was a completely innocent victim. And why is a staff member's word more authoritative than the T-ara members themselves, anyways? Because that's what you want to believe.
They were kids all struggling to make it in an agency -CCM- who is best known for terrible feuds between talent and the agency. They simply do not manage their people well and that is more CCM's fault than any of their artists.
I have no doubt mistakes were made on both sides. I believe Hwayoung was alienated from the other T-ara members and I'm sure Hwayoung also earned the resentment the others felt. The lion's share of the fault lies more on those who created the atmosphere and did nothing to foster health relationships in the workplace - CCM.
Hating Hwayoung, or saying she will never be forgiven (when she hasn't cause you harm in the first place) is a sign of the same immaturity that doomed T-ara in the first place. Leave the past buried where it was. I'm frankly tired of childish netizens demanding artists stop performing for trivial perceived infractions of a moral code those netizens themselves don't follow.