And I think that people should engage their brains before making silly comments like yours.I think people need to read the detail of this before making silly comments.
Anyone that knows the harms of online content will appreciate why this legislation is happening and ought to be supportive of it.
Yes, site owners will have do a risk assessment, possibly increase moderation and may need to change some forum features. If that's too onerous maybe they shouldn't be running sites at all.
The OSA would be better named The Whingers & Feckless Parents Act and "anyone that knows the harms of online content" should have the nous to ignore the garbage for themselves and/or ensure that they know what their children are doing on their electronic devices. If they're unable or unwilling to exercise personal responsibility, then perhaps a Ban Idiots From Having Internet Access Act would be more appropriate?
I'm lucky in that I live in a country where the government doesn't see it as their duty to interfere with how grown-ups choose to use the internet or what they permit their children to do, and the population responds, by and large, by behaving responsibly. The nation has experienced the dubious benefits of a Socialist Nanny State and has decided that it wants nothing to do with another - and pensioners still get supplied with cheap heating in the winter here!