The difference is vlad this is the internet age, and things are not as clear cut as we would like them to be, and things like this are the reason laws and the constitution need big overhauls to include things in this digital age, and unfortunately I do not think many things will be in we the peoples favor.
BUT…
As it stands right now they shut down a service they offered as a convenience not something that was a right to those who use the public transit.
The problem lies in a situation like this is that its a BIG grey area, shutting down service as they did can be taken as a way to remove someones right to assemble as cossey said, but given that the means in which were being used for people to communicate and assemble have more then a single function, it can be taken as a way to prevent civil unrest and assure the safety as those around if there was say people promoting a riot or use of force to get their cause out there. Lets say a Facebook page was made about a non-violent protest and one person says I’m going to shoot the douchebag officer. Well now that can be taken in a completely differeant fashion as its now no longer about being civil and non-violent.
Reading that paragraph over its not worded how I’d like it to be but im kinda bust ATM hopfully you will see what im saying.
THERES WAYY to many grey areas when it comes to the digital age with certain subjects these days.
Again do I think its exactly kosher? No not in the least bit, but as it stands right now I think calling it a constitutional or human rights violation a little extreme.