There is a distinct and real possibility that a WML, when activated, will turn into a default flashlight. When this happens the gun will be pointed at things and people. This is a legally sketchy place to be in.
No thanks.
I want to decouple my illumination from my weapon. I must identify first, then engage, if needed.
I'm even to the point where I am tempted to get rid of it on my home defense weapons for the same reason.