You were subject to the full force of the legal system way before you set up a port on a server.
And you can totally set up a port on a server to allow users to voluntarily enter some information and do stuff with it. The law does not prevent that at all.
I think that you're misunderstanding the spirit of the "full force" comment. The fact that I'm subject to the "full force of the legal system" to with regards to preventing murder, doesn't justify every new regulation and its effects.
Does the law prevent it, if I don't want to spend time adding a full account verification system for personal data dumps, permanent data deletion, and other requirements?
And you can totally set up a port on a server to allow users to voluntarily enter some information and do stuff with it. The law does not prevent that at all.