If you are selling a service, you want to be ahead of the demand. A parking lot, a business, isn't going to get far by lecturing to customers as to their car choice. That would be like me shutting my office to any client I though needed a better business plan. You have to take the customer as they are.
No, you absolutely do not. Have you not heard of, "No shirt, no shoes, no service", or "You must be at least this tall to ride", or "This event is open to anyone 21 years of age or older" or "This software requires Windows 98 or later"?
Sure, but not every business needs to accomodate all the needs of every consumer. Customers who are looking to purchase a tube of toothpaste probably wont be coming to your office in the first place.
