[QUOTE=Gfactor]
I once wrote a high school book report on cyberlaw, and I agree with **Random ** and Campion. 
[/QUOTE]
My son watches “Cyberchase,” on PBS Kids, so I too am qualified to opine on this issue, and, shockingly, I agree with Campion’s answer and the concurrences of Random and GFactor.
Let’s assume that the hosts of the message board in question were bound and determined to resist with all the legal tools available to them.
The general sequence of events would be, as mentioned above, that the records would be requested via a writ of subpoena duces tecum. “Subpoena” is from the Latin for “under penalty,” and refers to the writ’s command to appear under penalty of punishment from the court if you do not. “Duces tecum” basically means “bring with you” and it refers to the specific kind of subpoena that orders you to produce tangible evidence: records, documents, and the like.
A subpoena may be issued with relatively little judicial oversight. As Random suggests above, any attorney in the jurisdiction can ask the clerk of the court for a subpoena for any matter in which he’s involved. As an officer of the court, the attorney is bound to use this power in a responsible fashion.
If the message board host believes that they should not be required to produce the records in question, they may move to quash the subpoena. This is a procedural motion that asks the cognizant court to void the subpoena. The party moving to quash must provide the grounds for his request. For example, the records requested may be privileged in some respect, such as revealing communication between an attorney and a client, or be the work product of an attorney’s legal representation. The subpoenaed party may complain that the request is overly broad, that producing the records requested is too onerous a task, or that the request will not yield any material that is either relevant itself or reasonably calculated to lead to the discovery of relevant evidence.
The court will hear the arguments and decide the issue. If the message board fails to prevail, they may ask the court to stay its ruling pending an appeal of the issue. Ultimately, the issue will be finally decided. If the message board still resists the order, the court may compel them via its power to punish contempt, by fines or jail time.