Looking at how the law applies at social networking sites, if a person belongs to a given national or local user group, it is true to say that any increase in the number of people joining the group is not only beneficial to the owner of the group, but also adds to the group’s potential utility.  This explains why it is very important for group owners to find appropriate ways of getting their co-workers and friends to join the group.’ Are there any drawbacks to joining the group? If so, what might they be and why?