I experienced it once, while flying back to Brazil from London using British Airways. They fucked up so badly, they were asking for volunteers the first day (I

I experienced it once, while flying back to Brazil from London using British Airways. They fucked up so badly, they were asking for volunteers the first day (I volunteered, got paid £450 + hotel, a sweet deal if you ask me), and then again next day. I've seen it happen again on a trip from Buenos Aires to SF. I think this phenomenon is probably more noticeable in infrequent (daily or so) 'important' (read: long and expensive) flights people are unlikely to forget about or cancel at the last minute.