If an account has been blocked from tweeting as a result of mass reporting, the best course of action would be to contact Twitter's support team and explain the situation. They may be able to review the account and lift the block if they determine that it was unfairly imposed.

When contacting Twitter's support team, be sure to provide as much information as possible about the situation, including any evidence you have of mass reporting or other abusive behavior. This can help them to better understand the situation and take appropriate action.

It's also important to remember that engaging in mass reporting or other forms of harassment is not acceptable behavior on social media platforms. If you see this kind of behavior happening, it's important to speak out against it and report it to the appropriate authorities.