Regarding this subtopic, I considered the following as disadvantages:
Technology might substitute recreation, this can be applied to all technology users because of the become a slave from technology that could think that the need to be connected to any social network or have access to the internet to be "Online".
People also may present difficulties to establish verbal communication, eye contact to mention some of them, the writing can be poor writing because people may use symbols instead of the complete the word.
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Parents in our days are very permissive while their children use technology not moderating the access to it and nor restricting some website that could damage their innocence (morality)