I found it invasive, and here's why. I e-mailed my resume to a person as a result of a job listing posted on a trusted job search website. After that, I got an e-mail that asked if I had really sent the original e-mail, and it instructed me to click a link to forward the e-mail to the recipient. The link went through a site called postjobfree.com. I googled that and it looked safe enough, so I sent it. Next thing I know, I'm getting e-mail notices of job notifications from postjobfree.com, and I'm being solicited to view a review of my resume from TopResume.com. I never signed up with either of these sites. This was invasive and I will not be using either of their services.
If you do not like emails we send to you - you are welcome to click "Unsubscribe" at the bottom of corresponding email or even delete your account here: http://www.postjobfree.com/account-settings