All it takes is one wrong click

I’m glad Catharine Hamm addressed the issue of United Airlines using online boarding passes to implement “new and infuriating ways to wring revenue out of its customers” [“Fault Lines,” On the Spot, Dec. 14].

This United sales strategy has also bothered me. The boarding pass process is getting more confusing, and I can see it would be easy to make a mistake when tired and rushed people are printing out boarding passes at the website.

Elizabeth Hoffman

Rancho Palos Verdes