Creative landlords can find any "emergencies" if they are motivated to snoop. I love the motion sensor and internet-enabled cameras I install around any rented unit. If the landlord comes in when I'm not there, I want to know why.
Nothing is worse than going out to eat and ending up with a big surprise when you get the final bill. More and more diners are seeing the prices on the menu and assuming that is the price.
That is not always entirely the case. That is where automatic gratuities and service fees come in.