Re: Can you hiss in a sentence without sibilant sounds?

I would argue no, you can't, for the same reason you can't issue the word how plosively for reasons of physical reality.

Some dialogue tags are a little too far. I especially dislike when characters give very long "speeches" that they scream or cry.

Have you ever tried to cry the words but how could you do this to me out of your mouth? It's messy. You might say those things while crying, but that's a different kettle of barrels of fish.