Chip, You seem to be forgetting that you are using the ships computers when you are getting censored. They have the right to control what is viewed on their equipment. Accessing the Internet from the ships computers is a convenience for the passengers, not a right.
As for you cell phone, it is your cell phone not the ships, so your example in this case makes no sense.
As someone else mentioned in an earlier post, create an email address just for friends and family. That way, you know you won't get spam with censor triggering words.