There was zero signage at the last few American airports I flew through. Four airports in 2 weeks and they all had different rules, and felt the need to yell at you for not knowing their nuances.

To me, it's not even about having different rules (which itself is stupid). It's the constant annoyed yelling. Like, can you at least pretend you don't hate yourself, the general public, and your job, for the duration of your shift?

If I worked retail and treated customers like the TSA treats passengers, I'd be fired the first day.