On Sun, Aug 29, 2004 at 10:59:04PM +1000, Shaun Oliver wrote:
> hi is there a way I can stop my guestbook from being hit by automated
> scripts
> I like having the feature on my site and I don't want to have to remove
> it due to stupidity.
A typical way this is done is to ask the user
to type in a code which is there displayed in
front of them on the same page in some slightly
obfuscated manner.
e.g.
Submit code: [ ]
[Submit]
(todays submit code is the current year
plus two hundred minus three)
(Adjust to your users level of maturity)
Others use a grainy picture of a number, but that's
not going to help you!
Yahoo use a similar thing to try and stop spammers
doing automatic account sign-up. When the rate
stayed pretty high, they concluded that spammers
could afford to pay people to sit there all day
registering accounts!
Matt
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