I don't think so there is any adverse effect of education. If we learn better then we can have a better tomorrow!. It helps us to develop our way of understanding in good manner. It is right that we may feel sometimes bored when learning some subjects. But,we are more interested to study our favourite subjects. There are many poor children on this earth,whose parents are financially poor. They are very interested to go to school and they pray for a good future.So we can surely say that education is a blessing! :)

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It is possible that thieves and robbers can plan better if they are more educated.
Terrorists can become fatal if they knowledgeable and can make weapons themselves through the education they received.
Many students are not able to withstand the pressures and are committing suicides. Education is being commercialized and has become costly now. Inventions and discoveries like bombs, chemical weapons have been fatal to humanity as they have been used many times against innocent people.

Now people of many countries are worried about nuclear weapons of neighboring countries and are involved in making nuclear weapons.
All educated people are thinking of jobs in the urban areas and now hardly any educated person lives in the villages. Educated persons are able to cheat the illiterate poor villagers in regards to their properties, facilities from the government, etc.
Now the the seeds and pesticides that are to be used by farmers are being adulterated by persons with some scientific knowledge for selfish commercial purposes.