This client has been a naughty little rabbit and is so far behind on their invoices that we've had to put this up to let anybody know that this is how they do business
Yes and no. Yes we do this when it becomes desperate but we could have done much worse (like small claims court), and no because this page only goes up when the client is so far behind on their bills (ten times the difference between the invoice's date and the due date) that we have other option. We have sent many reminders but they have so far decided not to pay.
Basically, we helped them out and now they've decided not to pay. It was a very reasonable price that has left us out of pocket. All they have to do is pay their invoice and we will remove this page.