system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman, Sa] What would Batman do about Jigsaw?

*[Batman,Saw]
gpt
Jigsaw leaves recordings of his voice somewhere at the scenes of his crimes, not to mention the meticulous setup each "game" requires. The world's greatest detective would find his identity within a single night. 

What might likely happen is that he finds the underling/acolyte responsible for the setup and get them to talk. It would be no problem for Oracle or his own computer to connect all the evidence together with hospital records to find Jigsaw's real identity. 

Jigsaw's games require ridiculous amounts of preparation, so all of the materials for his crimes will need to be bought or stolen from somewhere, most likely a hardware store. It would be easy to track all of the purchases or reported thefts of the specific hardware used in the latest murder and find out where he had them sent. Jigsaw would likely be at that location, tinkering and setting up another murder. 

He has traps and warnings set up for normal police and regular police procedure at his hideouts. Such things would also stop any regular person trying to sneak in for revenge. He would be woefully unprepared for the Batman, and would be taken down by a single punch.