Now you are just making stuff up.
So you want us to believe that these folks are completely hammered, but they have the common sense and wherewithal to worry that there “might be a checkpoint”? And you heard this where?
The BS meter has just pegged.
My sister worked as a bartender for 10 years within walking distance of my house, about a mile away. I’d go for my walk and keep her company on many nights. Some nights I may have a few alcoholic drinks but mostly just water from walking in hot weather. Yes, this is what people would say.
Go out a little more to some of the bars in your area known for heavy drinking. You’ll hear this.