I think it is uncharitable. Depending on who you're dealing with, trying to hide any checkpoint problems might come across as a red flag. Joking about it is a

I think it is uncharitable. Depending on who you're dealing with, trying to hide any checkpoint problems might come across as a red flag. Joking about it is a way to show that you're honest while indicating you don't think there's a serious problem now. It's up to the listener to agree or not, but at least you reported the incident.