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For a contact form I think it's ok to show a challenge. It won't eliminate spam entirely or work against targeted attacks, but at least it keeps out the bulk of
by dessant 8y ago
For a contact form I think it's ok to show a challenge. It won't eliminate spam entirely or work against targeted attacks, but at least it keeps out the bulk of annoyances (at the cost of annoying some of your users :P).
EDIT: Have you considered putting the messages in a pending state instead? You could ask for their email in the contact form, and send a confirmation link that needs to be clicked for the message to be validated. Unvalidated messages could be deleted after a week, without any human interaction. I'd expect this to have comparable effectiveness against untargeted spam.
- robin_reala 8y agoNot annoying; blocking. There are a reasonable percentage of people that cannot solve the current set of CAPTCHAs.
- dessant 8y agoYes, and Google also blocks the audio challenge sometimes, so people with impaired vision or with neurological issues that affect object recognition are effectively denied access to a large portion of the web.
- CamperBob2 8y agoAt some point the ADA will come into play. Google has to realize that... don't they?