I'm thinking of all the "facts" I was taught in school that turned out to be flat wrong.
If you're in favor of existing slander/libel laws, then you've already trusted the legal system to distinguish between merely unpopular opinions, and willful misinformation. This renders your previous objection moot.
Who defines "misinformation", and who categorizes "deliberate"?
I had a vision last night in which a large avian diety wearing a tophat informed me of the true nature of existance as well as nuanced details about your private thoughts and secret behaviors.
If I share these details with others, who is the authority responsible for determining their truthiness, or wether or not my subjective experience did indeed happen?
The same authorities who are currently responsible for enforcing laws against libel and slander. Are you also in favor of repealing all such laws?
The information I shared in the OP is neither libel or slander, but seems like it would be covered by gossip laws.
( is gossip a sufficiently vague term that this whole debate falls under the modern trope of creating new laws for the purposes of optics, which actually address issues that are already covered by existing legislation? )
I suspect spreading nonsense is like regular exercise for social groups, helping them remain fit in case they need to be put to use for some real purpose (like, say, unseating the mayor in a scandal).
Remember what happened to Galileo? Or worse, Tyndale?