You don’t have to hang out for someone’s bad reaction. All you have to say is that they were denied based on credit and direct them to the procedure to request a copy of their credit report (which is legally all you’d ever need to say) and do this on a loop.

I worked at a hotel, and pretty much all you need to do with unruly kids is look them in the eye and say “out” while pointing at the door, until they leave. If you know who the parents are, you can send nasty grams until it stops - unsupervised children in common areas is usually against the lease.