It isn't just guns and knives,
http://volokh.com/archives/archive_2009_08_23-2009_08_29.shtml#1251409453From the [1]BBC News:
Plans to replace the traditional pint glass with one made of
shatter-proof plastic will not be accepted by drinkers, the pub
industry has warned.
The Home Office has commissioned a new design, in an attempt to
stop glasses being used as weapons.
Official figures show 5,500 people are attacked with glasses and
bottles every year in England and Wales....
An accompanying statistic reports that "[a]pproximately 126 million
pints of beer are served a week in the UK"; if the 5500 attacks were
all using pint glasses or pint bottles, that would be about one attack
per million pints served. Thanks to Kurt Kastorf for the pointer.
References
1.
http://news.bbc.co.uk/2/hi/uk_news/8217775.stm