Originally Posted by
narvik
The post immediately prior to yours has a link that lists a few scenarios, such as:
- Weight & Balance issues
- Federal Air Marshal {FAM}
A common one also would be an upgrade cleared after boarding.
This obviously wasn't a weight/balance issue, and pax are supposed to be provided a new b.p. in the latter two cases. Unless or until that happens, I don't see how the passenger in question could be seen as being in the wrong.