The only thing shielding companies from liability is Section 230 of the CDA. Without it, companies could be found liable for user generated content that they host.

There are literally thousands of lawsuits filed every year seeking liability from companies that are thrown out simply because of the CDA. I wouldn't say that those thousands of lawsuits are pressed by unreasonable people.

That aside, at least to me, if you're going to provide a platform for children to interact with other people, you better make sure those other people can't and aren't using your platform to exploit kids.