It's complicated.
http://law2.umkc.edu/FACULTY/PROJECTS/F ... lying.htmlDoes the First Amendment protect lying? Depending upon the context, the answer is either "no," "yes," or "maybe." It is an interesting question which the Supreme Court is almost certain to revisit.[snip][end]
Certain kinds of deceit can be prosecuted - false advertising can be, if you make deceptive and false claims for your product.
That said, I guess my main problem is it again goes against Internet hosts/content servers as common carriers. My view is the main party responsible for making false and deceptive speech is the one making that speech - not the site/server/host on which it is carried.
That said, there are steps that a site can make to reduce the deceptiveness of the content it carries. One might be verifying the identity of entities.
The largest Black Lives Matter page on Facebook was a scamA CNN report found that the page was being run by a white man in Australia.
https://www.vox.com/identities/2018/4/1 ... -page-fakeI think consensus is moving around toward people on Facebook being less deceptive about their identity. Perhaps even forcing some proof of authenticity. Of course, this intersects with the other ongoing concern over privacy rights, and the need for anonymity.
Which I understand can be an issue at message boards as well.

MBs allow anonymous speech because there is a legitimate problem of online/offline harassment. BUT, of course, same thing enables people to sock, troll, and play silly games. Alas.