If I take the time to throw away a WT I see, will I then throw away a booklet on Mormonism or Scientology when I see them?
Sorry, I just cannot take your middle of the road approach, even if I agree with it.
I would throw them all out. I am doing the potential readers a favor.
Also, each person has their own windmills to tackle. I am not against fighting for a cause even if I don't get involved.
There's nothing wrong with an ex-JW throwing away WT and Awake, while not bothering with other religious materials, same as doing a walk-athon for fighting breast cancer, but not walking one for birth defects- you do what good you can or want to do. Others will do other things.
If you cannot throw it out: An alternative is to write a website on the cover. "See jwfacts.com to get a balanced view"