The use of technology is important in the modern era, and the use of laptops is necessary to learn outside of the box which is the book. Internet provides interactive apps which are more interesting to learn than the knowledge in books. Use of laptops fills student with excitement to learn which is not the same in case of books.
Another big advantage for schools is that they have to spend less annually as the laptops are really a one time investment and could be use logically between classrooms and periods.
I don't think somebody would punish an entire generation (everyone used Facebook at school at least once). Also, let's say some freaking hacker could put a trojan on his computer and make it send files(other trojans) to every laptop. They will still be there when he leaves school, and he could, for example, take down a small website with a DDOS. Now think the trojan would be sent to every student in several cities (a good text or something, send by a teacher to his colleagues and then to their students). He could take down Google if he wanted.
Well... possibilities are endless, but we can not let the entire generation suffer just because some freaking hacker hacked the computer. Why should students who want to work hard, sincerely and honestly suffer from someone who doesn't want to work.
And if you check sources, you will find about 63% of students work hard in a school, or a college. And only about 37% who don't work. So, all in all it is a gift to have a laptop and also a curse. But majority wants to use it to prosper.