Another example of why just because you can doesn’t mean you should. Privacy advocates are already looking to strangle the ad industry. This just adds fuel to the fire. Users don’t even know they need to opt-out of this kind of tracking which leads to media stories and then people blocking all tracking technologies even the benign ones which fund the web.
For example, if [a visitor] went to XYZ.com and filled out a web form and then [the visitor] later visited 42floors.com, [42Floors] would be able to identify [the visitor] by name/email as well as company details even though [the visitor] never filled out a web form on [42Floors.com].
via You’re not anonymous. I know your name, email, and company..
