Yes. We cannot put the parents in a time-out. BUT we can enforce our policies and demand the respect we deserve. One example of demanding your respect as a business person...Refuse care for their child when they show up in the morning without late fees or full amount due.
As a parent, I cannot imagine disrespecting, short-changing and pissing off the one person who has such a huge influence and upbringing in my child. That's just plain dumb. It's also a good way to get terminated in my daycare.