I believe some states do enact legislation enabling them to bill people for rescue services. Those involve people who do things like go caving or mountain climbing in places or at times that they aren't supposed to and end up needing rescue.
Locally we had a condemned building. The owner was ordered to make it safe and refused to do so. The building collapsed out onto a public roadway and the county had to remove the debris to clear the road. The owner was billed and later sued for the cost of cleanup.
I think that the above examples however are different from the excercise of free speech. Billing for planned security for an event that did not occur is also different than billing for something that actually happened. I don't think as a free society that we should ever place a cost on the exercise of free speech.
Locally we had a condemned building. The owner was ordered to make it safe and refused to do so. The building collapsed out onto a public roadway and the county had to remove the debris to clear the road. The owner was billed and later sued for the cost of cleanup.
I think that the above examples however are different from the excercise of free speech. Billing for planned security for an event that did not occur is also different than billing for something that actually happened. I don't think as a free society that we should ever place a cost on the exercise of free speech.