"Unfortunately, as in any public gathering, there may be occasions when a conflict arises between people or when one individual's actions bother another... As our crew members may not always be witness to the inappropriate acts of a particular passenger, there may be a limit to what our crews can do to improve behaviour that is perceived as a nuisance."

Would that mean that the next time I hear a guy singing along with his iPod, I can bean him with my laptop?
Seriously, even if the Americans see some sense and elect a sensible slate of candidates, this kind of behavior will continue for a while. The average Joe and Jane, both in America and to a lesser extent in Britain, have their adrenaline up and will continue to suspect people who are not of their particular tribe.