The point is that there would be additional ways to stop their speech through legal means. >Just give a concrete example, do it! As said elsewhere: you can't

The point is that there would be additional ways to stop their speech through legal means. >Just give a concrete example, do it! As said elsewhere: you can't prove a negative. Asking for concrete examples on this topic is like asking for a concrete example about an epidemic that a food safety law prevented. You wouldn't claim that we don't need food safety laws just because you couldn't give us concrete examples of epidemics that were prevented due to that food safety law, would you?