Essentially some of the reporters didn't do their job right. The job of a reporter(as opposed to a gossip writer) should be to give us news which is as truthful as possible, and a key part in their process should be fact checking. Without fact checking anyone could say anything and then they will just write it up. Then as consumers of news we would be making poor decisions due being mislead by those reports.
Translation sites such as allkpop should also be responsible for their articles/translations, particularly for these delicate issues. Understanding that they(allkpop) may not be the original publishers of those articles, they should at least stress the nature of these articles as rumors. (I tend to check allkpop for kpop news so I can only talk about them)
As human beings we can (sometimes) easily jump to conclusions. This is (I suppose) the danger of emotions. As many might know we make decisions based on what we currently know, so obviously the more we read the better educated we are on the issue, but depending on what we read this may also cloud our judgment.
So all those netizens out there who have jumped to conclusions and tried to find their own evidence by manipulating facts that are taken out of context should take a step back and breathe again, especially as most of the storm appears to be over.
Now on a side note, about this T-Jinyo group. I don't know how they will go about their protest, but bullying may or may not be the serious within T-ara. The obvious issue to me is management, and in particular the ceo. Little squabbles can be dealt with in private. But letting their issue, which according to the ceo is Hwayoung's refusal to go on stage, then appear to be or be interpreted by the public as bullying is hard to deal with.