Meh. My bestie has worked the county counsel office in two different counties. He told me it is standard practice for court clerks to hand out stacks of blank, pre-signed subpoenaes to any attorney, government or private practice. Of course the caveat is if you abuse them, there will be, trouble.
Breaking the law by those enforcing it is meh?
In the case of this Louisiana Prosecutor, it seems like perhaps the courts are so overwhelmed they can't even get stacks of pre-signed subpoenas so they write their own. And the article states that when said Prosecutor has been called on it, a Judge issues a real subpoena. So yeah, meh.