Helen Deborah Vecht wrote to uk.transport.london on Tue, 21 Dec 2004:

I think the only thing that would stop graffitti / etching /seat
slashing is the presence of enough staff to prevent such actions. This
is expensive.

I was on a bus this morning that had adopted a solution I sincerely hope
doesn't become widespread - it had some kind of net over the windows,
from the outside they looked red, but from inside it was mesh, and you
simply couldn't see out very well. After five minutes I felt so sick I
had to go and sit downstairs - at that stage, luckily, I was the only
person on the bus (137), so could find a seat where I could see out of
the front window. Please, please, don't let them do that on more
buses......
--
"Mrs Redboots"
http://www.amsmyth.demon.co.uk/
Website updated 18 December 2004