You can use surveys, and interviews of others about the target influencer to get a reading on attitudes towards the target influencer.

FORBES: Can You Measure Your Digital Eminence?

If the mommy market is the target this means actually reading the hundreds of blogs and Pinterest articles, as well as joining the Facebook groups.

FORBES: 7 Steps to Better DIY PR

Because blind Web surfers use automatic reading software to interpret pages, CAPTCHAs represented insurmountable walls on Target's site.

FORBES: Identity Theft