Call it whatever you want, but it is not only against the law and a major expense for owners and managers, but it also poses a direct threat to human health and damages our shared environment. Posting No Trespassing No Dumping signs that warn of your willingness to prosecute violators is essential to maintaining control of your property and stopping illegal disposal of waste before it happens. Using No Dumping Violators Will Be Prosecuted signs not only protects your assets, but it also protects the property and well-being of your tenants, visitors, and customers.