Understanding the potential sin of technology is a very good thing, it connects mankind--often first world people--which will obviously create countless cesspools of sin, because that's what people do.
However, all earthly tools, including internet, can be double edged.
Weapons allow for defense, but it also allows for absurd violence.
Food allows us to live, but in excess we become gluttonous pigs.
Drinking can improve recreation, but, y'know, alcoholism.
Knowledge can improve society tenfold, but it also allows nuclear bombs to be invented.
The internet is the same. People are inherently sinful, and the internet allows us to sin without real life consequences. It's a logical impossibility for us not to act like total heathens.
So, like weapons, we should use internet for good and actively avoid sin with 5 times the caution, because sin can only be stronger in this technological hellscape