Is it ever okay to quit a project in the middle of it?

[Btaliat]

Freelancers can leave tasks in the middle of it if it requires that. You don't need to continue working on tasks if the clients sound so abusive. It is better you leave tasks to save your reputation rather than risking it for the money. A client that keeps adding more task beyond what you have on the scope, clients that are asking some questions that are unethical. You need to make sure that you are not tolerating unethical practices in the name of your want more clients