I think this show is okay for kids. It doesn't have any bad language or anything. I do admit it has violence, but they hardly ever show any fist or foot contact.
This show is probably going to scare young kids and sensitive people, but it is otherwise perfectly fine.
You have said that Danny (the title charicter) is more agressive in his ghost mode (The PROPER term for his "phantom persona"), but this isn't necessarily true. in fact, in the episode "Bitter Reunions", he stood up to the villain (IN GHOST MODE) and said "I don't want to fight you". You also have said that there are death threats. the only time Danny was threatend was in the episode "One Of A Kind". There are also pretty much no guns or knives, and there isn't womanizing! (You said "...Violence toward women is commonplace in this show.")
Therefore, I beleive this is a great show, and there isn't anything wrong with it. I think that you should at least watch it yourself instead of just jumping to conclusions. like I said already, this show is fine. It's not broken, so why should it need fixing?