Lots of these seem reprehensible, but totally within a reasonable space of legitimate free speech. Barring the cases with calls for imminent harm (e.g. turbulent priests and such), it seems that there's a big risk in trying to draw a legal line here.

In your polling station example, for instance, that has some clear negative impact. If I instead said "The library will be closed for the next month", is that protected though? What if I say "Arby's will be giving out free sandwiches from noon to two o'clock tomorrow"? All of these statements have negative impact.

The rationale for more extensive free speech is that it is expected that individuals have the right to hear what others are saying, and evaluating how bogus those are.

To be clear, some censorship is absolutely accepted in society today (e.g. libel laws, imminent threats, marketplace standards, etc), but the fear of an ill-defined line that can be shifted to suit political winds seems like a very reasonable one.

As for the rest, you're free to make whatever lies you want about others. Free speech doesn't allow you to initiate force against others so I'm not particularly concerned with any of it. We have gun rights to deal with people that try to enter your house or attack you over your skin colour and space laser accusations.