You can also set out the terms on which you will employ them. McDonalds having a policy that McDonalds cashiers can't deliver anti-McDonalds rants to McDonalds customers as they walk up to the counter is not "sick tyranny".
It's something so simple, basic and reasonable it sits at a level or two below "common sense". It's at a "you'd have to be seriously mentally impaired not to see it" level.
They are paid to say "Do you want fries with that?", so that's what they say. Their free speech rights do not entitle them to say what they want behind the counter of McDonalds without being fired by McDonalds.. Their free speech rights place no burden on McDonalds at all. Their free speech rights place a burden on the government only. The government is not allowed to punish them for speaking. That's what free speech right are.
Yep. And without going into an exhaustive list of reasons why the 1AM only applies to government action, suffice it to say that there's good reason employees can be fired for what they say on the job. It becomes different when it's a government employee though. That gets complicated too though and I have full day of complicated things to do, so I won't use my limited brain horsepower on it. Besides, nobody'll read it anyway because it's boring as hell.
Anyway, Dismal is 100% correct on this one.
An at-will employee can be fired any time for almost any reason. Please take note that I used the word "almost."