I think the message I've been telling all along here is, it is absolutely correct to enforce free-riders or troublemakers crossing classes. But there exists some flexibility in class-crossing on all airlines, which are well documented on other FT posts, and how the airlines exercises this enforcement. What I am "whining about" is CX's subjectiveness of the enforcement, and there exists some sort of inconsistency or favor on certain groups of people on how this is exercised. Here's some scenarios:

- Parents with children/nannies in lower class
- Class-crossing cases involving Invitation or Diamond Members or VIPs (e.g. an INV J-pax walking into F? This would be a classic "Do you know who I am" case)
- Family members in different classes

I would not have "whined" if the FA asked me my cause of visiting and exercise her enforcement accordingly after knowing the reason. In my case, when the FA asked me to leave, I did so expeditedly to avoid disruption to either F or J class paxs.

I have witnessed on JFK-HKG flights, someone sneaking up from Y to J, making themselves comfortable and setting up the AVOD etc. for a good hour or so, until the FA discovered and kicked him out, but even under this case, the FA asked questions for the cause of removal thoroughly. His reply was "I'm waiting for the restroom" (also in J) which was nonsense. From my example, do I fall into this "free-riding" category? I'll let you guys be the judge as I'm not gonna comment further, as I think FT is a good discussion platform for matters like these.

Or to the extreme, TSA/Homeland Security would love to impose class-crossing restrictions for anyone. Heck they even tried to ban us from lining up for the lavatories. As FTers would we like to see this sort of enforcement?