HARMFUL CONTENT PROBLEM OF INTERNET

IMHO, Internet (WWW) was created for helping advancement of humanity, but today it is full of harmful content & it is becoming a bigger & bigger danger for future of humanity!

IMHO, it would be extremely naive to think Internet websites/companies would do a good job of cleaning/filtering voluntarily by themselves!
IMHO, past history of large Internet websites/companies like FaceBook & Twitter & YouTube absolutely/clearly shows that, they never really want to deal w/ cleaning/filtering of their own content! (Which is absolutely no surprise because it is no doubt a constant hard/costly work for them!)

IMHO, still, they clearly/absolutely have a social responsibility to keep their content clean!

IMHO, it seems like, large Internet websites/companies, like FaceBook & Twitter & YouTube, trying/working to cleanup their content currently, but that is because there is a huge public/media/government pressure on them currently & nobody should/must have any doubt that they would stop cleaning/filtering, as soon as the pressure is gone, given all their past history!

& what about countless other smaller Internet websites/companies?
Do we know if they are cleaning/filtering their content too?

IMHO, only realistic & permanent & general solution, would be to a (national/global) law, to always force, all Internet websites/companies, to keep cleaning/filtering their content!

But what kind of content needs to be always banned from whole internet exactly?
Do we have a fully comprehensive detailed list anywhere?

IMHO, the law could have a list that covers only the basics @ first & that list can be extended anytime in the future @ national/global level/scale!
AND/OR:
IMHO, the most basic general rule for banned content could be, anything that is a crime in the real world is also crime/banned in the Internet!
So, uploading video/picture/sound recording of any actual crime to Internet would be crime/banned!

IMHO, the law should/must also force all Internet websites/companies to verify identity of their users, always as best as possible w/ currently known methods @ that time!
(For example, GMail currently uses phone text messages to verify user identity!)
So that any user that uploads illegal content can be permanently banned from each & every website @ Internet!
Because, otherwise, people/users could easily keep creating new fake identities/accounts & keep trying/uploading again & again!
(Which would make, job of cleaning/filtering, a lot harder than it needs to be, for all Internet websites/companies!)