If you want to know some of the disadvantages of the internet, then I shall bring the practices of many Arabic youth: They mostly use it on Facebook, Twitter, WhatsApp, and on following football games. As for the first three, they chat a lot with unknown persons & are cheated a lot (they may spend days thinking that they were talking with girls to find later that they were actually guys!) but they never learn. As for football craziness, you can find Arabic males downloading several gigabytes of games to become well-educated in the names of teams, players, and coaches... all of that at the expense of many things including their studies.
Yes, I agree with you Nizar. Our youth mostly tend to use the new technology facilities, including the internet, in negative ways. They waste most of their valuable times searching for useless things, sometimes it raises issues amongst them and other community members. Moreover, it definitely affected their physical communications with their relatives and even their families' members. Regards.