Sometimes when running an open Internet community it is better to hold newly-registered users back from being able to immediately add new content to help guard against abusive behaviour.
On the User limits settings category change the New user action delay setting to the number of hours before they are allowed to contribute. During this time they will be able to read as normal and join groups but will be prevented from adding any content or updating their profile. An alert when they log in will tell them the time when the restriction will be removed.
2.0.0
Limiting the potential for abusive behaviour from new users.