Pump action or aerosol?

I read somewhere today that authorities are thinking about spraying the underground with dissinfectent to try and minimise the spread of flu germs this winter. The plan is to spray all the seats and handles on the tube and in the tube stations. I read on....looking for the punch line, but apparantly they are serious.

I hope it's not similar to what they do on the flights into Australia, where they spray you down with a can of Mortein (fly spray). 'No need to panic - we're just spraying you dirty bastards before you get off the plane. We don't want any filthy parasites entering Australia - or insects on your clothes'.

Imagine the public panic if someone walked through the tube spraying passengers down (yes, I know. Highly unlikely during peak-hour. Let's face it, you can barely squeeze onto the tube). perhaps a deodorant would be more effective...or just some air...