It is true that the population in some regions will be too high when the economical productivity is too low. Growing unemployment, low education and living standard for most of the people as well as a security problem will be the result. But teenage pregnancy, forcing unplanned children (pre-marriage conception), dropping out of school, dumping babies, ending up in prostitution is not the result of over population. It is rather the sign of a moral decay in the population.
I am a soccer fan who is frustrated by the current situation during soccer matches where people are not allowed to go outside if they wish to do so even during half time until the match is over.