Half of these scenarios are just variations of the comment I replied to. Again, there's a contract of sale. Your speech isn't being violated when you sign a contract promising you're selling what you claim to be selling.

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.