Interesting solution to avoid registrations made by robots

I have seen many anti-spam questions in registration forms but this is very interesting

http://www.tyneteesscoobies.co.uk/forum/profile.php?mode=register&agreed=true

 

How do we put something like that on our forums?

 

I have no idea, this is not my forum. I found it when I registered.

 

one way to do this would be to use a html form with php to randomize the order and an if statement to check to make sure the right ones were selected.

 

Thats an interesting idea. Would be easy to make and integrate.