Here's my favorite explanation of this formula: http://betterexplained.com/articles/intuitive-understanding-...
Unless doing it this way is actually more effective at reducing spam than a normal captcha, then it seems like this is just an intrusive advertising measure rather than anything useful. The potential for abuse just…
Here's my favorite explanation of this formula: http://betterexplained.com/articles/intuitive-understanding-...
Unless doing it this way is actually more effective at reducing spam than a normal captcha, then it seems like this is just an intrusive advertising measure rather than anything useful. The potential for abuse just…