Imagine if you will, an adult person taking kids to event that could be fun, educational and nutritious on a lawn in the middle of town like a tag sale.
If they were there to set up a small booth to sell their own families' goods as planned but were met with the person in charge being rude, not finding time to direct them or tell them they'd need to wait for (5-10 or more minutes Please), they could be offended and decide to leave for good.
Not come back later or maybe even not another time...and then if upset enough, might think to post on Facebook not only about their basic experience but