Non-Customer Using Restroom
Question
What is the halacha when it comes to using a restroom in an establishment that has a posted sign that says it is for customers only? Suppose you have to go so badly, you can’t hold it in any longer, but the establishment expects on honor that only paying customers use the restroom, and you have no plans on purchasing any merchandise from that establishment or desire to do so? And there are no other restrooms nearby.