robots.txt for keeping certain forums from being indexed/spidered?

[DFC99]

Hi, I've got a few forums (e.g. f=46) on my forum (such as the sandbox and off-topic) which are open to everyone to see, but I don't want them spidered by google and other search engines. Is there a way of doing this using robots.txt? Thanks :)!

[ssslippy]

Not all search engines follow the robots.txt. So this wouldnt quite work.