How to Use "Web Personalization Security"

How are people using the Web Personalization Security feature?  I hadn't seen/heard of it until noticing a reference to it on the Contact/Account fields configuration screens where a link to documentation is provided (https://docs.oracle.com/cloud/latest/marketingcs_gs/OMCAA/Help/ClientSecurityConfiguration/Tasks/WebPersonalizationSecur…

We hoped this may help with form pre-population issues when an email with link to a landing page/form is forwarded to another person to prevent having the original recipient's details populated in the form, but it seems the form is still populated with the original recipient's data regardless of the settings configured for Web Personalization Security.