I'm quite interested in learning more of the legalities involved, particularly in my state, Washington. But in general, I think we "look" better using a "non-weapon" than something defined as a weapon.
It's silly, but I think most courts and Prosecutors (Persecutors?) are more likely to nail you to the wall for stopping an attacker with an ASP baton, a nightstick, or another "weapon," than for caving in his skull with a flashlight or the bar you were using the tighten the load binders on your truck.
That being said, the cane looks pretty good. It's just too bad there are so many laws opposed to the telescoping baton.
“The police of a State should never be stronger or better armed than the citizenry. An armed citizenry, willing to fight is the foundation of civil freedom.” Heinlein