Things became more interesting when the matter escalated quickly. A corpo and heroes war actually took place. It was just that it was not a battle of might. It was a battle of words and public image.
The heroes called out many officials and exposed their crimes to the public. They called on the public for their arrests and imprisonments.
The corpos, on the other hand, struggled to hold on. They were the ones that started the public bashing. They could dish it out but couldn't take it after their dirty laundry and the skeletons in their cupboards were exposed.
The corpos did fight back using the secrets of heroes. After all, the heroes weren't perfect. In fact, many of them were rotten to the core.
But a hero committing murder and hiding it can't compare to a CEO kidnapping people for lab experiments, running a human farm, or running a sex trafficking ring.