Note that if the players wanted to, say, protest on a public street downtown, then it would become a freedom of speech issue. As someone who strongly supports free speech, it's a little disconcerting to me that there is such a broad misunderstanding about what the doctrine means. The Constitution applies only the the government, not to private people, and not to businesses. Thus, you can kick someone out of your house if don't like what he says, or a business can fire people if they say things that hurt the business while representing the business.
Note that Congress can pass specific laws regulating what you can or can not do, or what a business can or can not do, but that is entirely separate from Constitutional rights. Those laws are limited by the Constitutional rights, however.
As to whether they CAN regulate what the players do, there is no doubt that they can. As to whether they SHOULD, that's up to them. They have an interest in keeping the fans happy, and an interest in keeping the players happy. They need to find a solution that works for both.
Last Edited: 6/8/2018 10:32:37 AM by L.C.