Yes. I have been to a lot of clubs throughout Europe. Never seen a fog machine that puts out colored fog. There is a reason for that. Only actual smoke or solid particulates can produce color. Same theory applies to vaping.
I have to agree. Being a professional musician (drummer) when we used color fog we had flood lights (in the color we wanted), about 2 feet infront of the fog machines behind me and that's how we obtained color fog.
The chemical that causes the glow in the dark effect is poisonous anyway. If you will read the warning labels on the glow sticks it states: Content In Sticks can be harmful or fatal if swallowed... I know we wouldn't be swallowing the liquid BUT we are still putting it in our bodies by inhaling it. It wouldn't be the same amount on an inhale as if it would be if we swallowed it BUT over time it would take its toll on our lungs.
We started Vaping to have a healthier way to take in our nicotine and to get away from the chemicals in a analog. If they add this chemical to the juices then someone is gonna come up with another chemical to get the vapor or juice to do this that or the other. Pretty soon Vaping is gonna be pointless and analogs are gonna start looking pretty good again because there isn't gonna be a difference between the two.
I say if its not broken why fix it...