A villager drove a forklift past my pond and reversed it into the water. The family demanded unreasonable compensation. Are we responsible?

If it is a natural pond, your family is only a contractor, and it has existed for a long time, and it is a thing that should be known to the public, then your family will not bear responsibility. However, if there was no pond before, but your family built or renovated the natural structure of the original pond, causing damage or injury to others, your family should bear corresponding responsibilities and liabilities in accordance with the provisions of the General Principles of Civil Law and the Tort Liability Law. Compensation for damages. But it's not full responsibility, just corresponding responsibility.