How do cyber communities differ from communities in the real world with regard to behavior?

It can be more difficult to identify inappropriate behavior in a cyber community.
It can be more difficult to identify inappropriate behavior in a cyber community.

They are not different in any important ways.
They are not different in any important ways.

People behave more appropriately online than offline.
People behave more appropriately online than offline.

Communities in the real world are more appropriate.

Communities in the real world are more appropriate than cyber communities.