At present, on Facebook, you can be added to groups without your knowledge or consent. A notification will be sent to you, but if you don't notice it you can discover that you're in groups that you do not endorse.
People are often added to ideological groups whose views they oppose to inflate their numbers, or for political mileage.
We are calling upon Facebook to change the way people can be added to groups to an invitation where the member has to confirm that he/she wishes to join the group in question before being added to the members list.
The Don't let people be added to Facebook groups without their consent petition to Facebook was written by Ramon Casha and is in the category Internet at GoPetition.