> I don't see any way to cancel Twitter mobs that doesn't itself uphold cancel culture and destroy liberty.
An invited speaker could require a signed contract before accepting the invite. At a fairly small expense, some free speech advocate/org could have a contract drawn up that would protect invitees to some degree, pay to have a third party audit the contract (is contract auditing a thing?) to raise the chance that orgs with teams of lawyers find it acceptable, promote and market it, and then make it freely available to all.
That might or might not work, but there are many more ideas in the wings that could be tried.
No institution is going to sign a contract like that. There are more people who would be happy to speak at events like this than speaking slots. If you demand a contract that says "you can't disinvite me," they're just going to move to the next person on the list.
An invited speaker could require a signed contract before accepting the invite. At a fairly small expense, some free speech advocate/org could have a contract drawn up that would protect invitees to some degree, pay to have a third party audit the contract (is contract auditing a thing?) to raise the chance that orgs with teams of lawyers find it acceptable, promote and market it, and then make it freely available to all.
That might or might not work, but there are many more ideas in the wings that could be tried.