The difference being, of course, that you do not have the legal right to burn down someone else's shop while you do have the legal right to fire your employees for violating your rules.
Every job limits your constitutional rights. I have the right to free movement, but if I take a week-long trip to Florida without my employer's permission, I'll get fired. I have the legal right to view pornogrpahy, but my employer can fire me for bringing porn onto his premises.
The rules are limited to the workplace, or they are not valid. In this case the extension of demand outside the sphere of the workplace and the employer's right IS extortion.
So, the Catholic Church couldn't fire a priest who was violating his vows of celibacy, so long as he only had sex outside of Church? The Republican party couldn't fire an employee for volunteering for John Kerry in his free time? An anti-abortion group couldn't fire one of their employees for performing abortions in their spare time? Your employer couldn't fire you for making negative statements about his business in your free time?
Sure, but can the employer violate the employee's rights to get this information? For example via wiretaps, burglaries (searches), or forced invasions of the employee's private property or person? I have no trouble with an employer firing someone if they find out they violate a rule by recklessly displaying arms or leaving them about. But concealed holster carry, or locked carry in a personal vehicle doesn't rise to the employer's attention unless the employer proactively asserts authority that isn't germain to the tacit employment contract. I'm not so sure that an employment contract is valid just because an employee agrees to give up his rights. In a similar vein, most accident release forms as contracts aren't worth the paper they are written on.
The employers limits have to refer to the workplace, or other business considerations. The employer can't demand that you decorate the interior of your car, or house to his liking. When it's a minority's rights being violated, it's the govm'ts job to correct and/or sanction the injustice. MAjorities don't have that problem, because they have sufficient bargaining power.
All workplace, or business related.