The internet as a network of network is neither positive or negative, it is a utility tool just like a gun which by itself is just a tool for use. Abuse comes in when a gun is used for robbery, oppression and unjust killings, but we feel very safe and secured when we find same gun held by policemen.
The internet is much the something, it is also a tool and the way we use it, gives the use case a positive or negative meaning.
Negative Use Case
Fraud: fraud has seen an exponential growth since the inception of the internet, creating words such as "internet fraud". Internet fraud ranges from impersonation for extortion to hacking and glorified ponzi schemes sites that are just waiting to go down with your cash.
Dark web: this is were all sort of crime are carried out from drug trafficking to sales of illegal items. In short, if can think of anything bad, chances are it is happening in the dark web.
Positive Use Case
These are the use case that eases our everyday life activities. The internet has given globalisation a platform of making it true meaning a realisation. The world is truly becoming smaller by the day, people get to connect in a was that has never been achieved since creation. With simple interest tools like email, website, search engines, social media and now the introduction of blockchain revolution is taking everything to another level of great positivism. Life changing capable dapp (like musing, actifit and many more coming with smt) on a decentralized platform like steemit. The world is sure going to be amazed when the masses finds out what steemit has to offer.