Re: @ joekhul
I *am* so arrogant as to believe I am immune to psychological suggestion or manipulation.
I regularly try test this out, usually finding that I'm wrong.
One good example was long ago, back when there was paper mail. Surveys were common, (Way back, before web tracers, before cookies, when dial-up modems were used.) I would ignore them. Then I got one with a crisp new dollar bill enclosed. Out of a sense of obligation, I filled it out. It took more than a dozen before I figured out that I had been expertly manipulated. I wouldn't have worked 20 minutes for $1, or given a marketing person that information for 100x that much. But they found a way how to make people feel obligated. And I feel for it. Repeatedly. And felt guilty for a while after I stopped.
I managed, just barely, to avoid falling for similar feelings of obligation when charities started sending free return address labels and free Christmas cards.
What about the 'Social Networking' epidemic, where every new company would try to boost their user count by secretly sending email in your name to everyone in your address book? 'Authorized' by a clause on page 51 of their terms and conditions. I fell for the 'personal' invitation from someone I trusted, and was saved only because I don't use the same password everywhere. Over the new few weeks I found that thousands of my friends and almost-friends were not so careful.