Also, he already had enough information for the cops to indict. So there was literally, no reason for Superman to do this, besides his evident enjoyment.

Also, Morrison has stated, in interviews, that he honestly believes Superman is right in what he does. That's right, Morrison thinks Superman should drop suspects off of buildings to scare them for his own sadistic pleasure. This isn't "entering stories", this is the writer's openly stated intent. I don't think anyone should stick their fingers in their ears about it.