The questions about subpoenas and summons and search warrants are amazing. I have never seen such answers. So let me put some things straight. Number one, I am NOT an attorney. This is not legal advice but general information available to anyone who wants to look it up and does that right. We are not talking about state or county documents here. Understand that point seriously. Almost all the items people have quoted about being out of state means the court has no jurisdiction are wrong anyway but people it says federal for a reason. They are United States Justice Department and United States Federal Court cases. Basically the state and county items do not matter.
Even in a civil case unlike what many people on the internet say you can be compelled to answer a subpoena. It is not a summons. It can order you to come to a place for a statement, to bring items and records with you for the court. They are called Subpoena Duces Tecum. There are others and some can be issued by attorneys like in Colorado which is called a Subpoena to Appear. Again there are different things they can require. Now for the people on the internet who will tell you that if you live out of state you do not have to answer a subpoena or summons. You need to check out something approved by every state, our capital and most territories. It is in the Uniform Code it is called the Uniform Code to Secure Attendance of Witness. It applies to witnesses but may also be applied to others.
I have stated before, try to be realistic but if they do not cooperate, file the paperwork and they will have to comply. There is more to this but the mentioned code above is basically where the local judge in the case files paperwork with the local judge where the person lives that orders them to attend the out of state court. The out of state judge does not have the authority to do that but the judge in the state where they live does have that authority. Now this is for civil state cases only. So applying it and the other rules to your question and comments is not germane as these cases are all FEDERAL cases with Federal rules not state.
Search warrants are not generally used in civil cases but may be if there is an indication that specific items may be or have been destroyed which in turn brings criminal charges to bear. Remember, taking hard copies, taking and using copyrights are misdemeanors until they reach a threshold then they become a felony.
Summons is used to tell you that you are being sued. They are the first step in a civil law suit. Most infringers would probably get a subpoena and a summons in my opinion.
I hope this helps to answer some of the questions and put aside some of the comments from people who have not researched it properly. I have stated many times, get a good copyright attorney because they deal with this all the time and they know it is strictly a federal case and the local and state rules do not apply to copyrights as they are only to be dealt with in federal court by law.
Disclaimer: I am not an attorney. These are my personal opinions and generally available information only. These are not legal advice and should not be used as such.