How can so many people be so ignorant to join false Facebook groups?

[rusted_gut]

I get so angry at humanity. Seriously this is a human problem, Groups concerning a dislike button, free giveaways, Facebook themes, groups to keep Facebook free, and notifications when someone visits your profile.
Have you ever joined one, why?!
All of them had deactivated their walls, so no one can say it is a scam. And most use this scheme
1• Join this group.
2• Invite "all" your friends to this group.
3• Wait 30 minutes, 75% of your friends will join this group, you will see 1 new notification in your profile just like this/application will become active.

These groups have more then 500 000 members. people. Willing to believe they can have a better facebook, it's all about hope. They are trying because they think they have nothing to lose,they don't.
They invite their friends and if nothing happens they blame themselfs or their friends for not joining, the never give it a second thought. They see fault in themselfs but still join these groups. This is a very small thing, but showing a major flaw in humans, False trust,hope,blaming yourself, not thinking,joining because thousands of other people cant be wrong.
Anyone see the connection to religion here?