How would they enforce this? Retrieving the funds. I thought the same but it could be extremely difficult..I understand what you are saying but in this case the scammers registered a company to provide a cover of legitimacy.
The authorities in South Africa will liquidate the company and recover all withdrawals and then disburse the funds equally among the depositors.
You may or may not be lucky and get away with your withdrawal in the another country but it is highly likely the regulators will co-operate.
However, the panic withdrawal is a good strategy to collapse the scam and make sure the scammers get less. Just be aware you probably have to give it back.