On 23 Nov 2006 10:59:11 -0800, Paul Weaver wrote:
http://news.bbc.co.uk/1/hi/england/london/6175604.stm

...but the T&G union isn't at all keen on their members having to
enforce such a rule, fearing they may be assaulted.

Don't blame 'em. The solution is to refuse to drive the bus while there
are scum on board.

Such a policy would be what's known in computing as a
"denial-of-service vulnerability".