Huh Today while setting up a project I came up with a brilliant idea (at least it is for me ). I dont know if someone have already shared it here but I think not. At least I heavent seen it So when you are iframing you have some offers where you have to iframe from address, zip code, etc. and people really dont like to give away all this information and one field or actualy more then one, you can put there a "fake captcha" so for example: Address will be a verification image where all the captchas are streets What you need is a base of streets in a country you are targeting this isnt to hard ha, deisgn a fake captcha, and some rotator which rotates those captchas. Two cant be from the same street And another one for a zip I remembered is that you put something like, write in the box 6 numbers and if you get 5 right you win a price (could be iphone or something) There are a lot of different ways you can trick people for iframing If i remember anything else ill let you know.