User blog comment:Fedora Lord Para 348/Defending Death Battle Fanon: A Series by ParaGoomba348/@comment-26363797-20150803203919/@comment-168.11.145.30-20150810180246

There's two problems with that

1.)Ben has no reason to assume that Danny is half human and half ghost or that he gets his powers from his DNA. He would more than likely assume Danny is a ghost posing as a human or an alien

2.)It would be hard for Ben to hit Danny with those lasers or get his hands on him

3.)Even if Ben could turn Danny Phantom back into Danny Fenton, Danny Phantom won't stay down forever. In Phantom Planet Danny got his DNA restored but he still turned back into Danny Phantom