Perhaps you could shed a little more light on things.
The average person sees a deadline as something you don't want to miss, but can be early on. So the typical response here is "Verizon was ordered to do by the 12th, they did 5 days early, what's the problem?".
Now, I've done a little digging around, and apparently the defendant normally has the right to submit a motion for the subpoena to be modified or quashed, if their motion is submitted prior to the returnable date of the subpoena. So how exactly does this work? Is there an unspoken, unwritten rule that you aren't supposed to deliver documents ordered by a subpoena prior to the subpoena's returnable date, to allow for it to be contested?
Certainly in this case yes, where (a) the information is private confidential information of the subscriber, (b) Verizon has notified the subscriber that the information will be turned over on May 12th in the absence of a motion to quash, and (c) there is a pending motion to quash.
And then the motion to quash was filed by a pro se litigant - not by Verizon. The subpoena ordered Verizon to provide the data and Verizon happily complied. So where did this John Doe pro se litigant come from?
He or she is one of the John Does. He was notified by Verizon of the subpoena, and of his right to make a motion to quash, which he did, in this case, exercise.
And why were they able to file a motion to quash?
Why not?
Was the John Doe implicated prior to the information being handed over? or after?
Prior to the information being turned over, he was notified by Verizon that it would be turned over on May 12th unless he filed a motion to quash.
Do we know if Verizon knew of the motion to quash?
I don't know for sure if Verizon knew, but it is hard to imagine any set of circumstances under which it did not know. If it did not know, then plaintiff's counsel acted in an extremely inappropriate manner. But it is much more likely that Verizon did know.
Do we know if Verizon knew that the pro se litigant even existed and had the right to file a motion to quash?
Yes it absolutely knew that. It sent him or her a letter telling him or her that it would reveal his or her identity in response to the subpoena on May 12th.