what happens if i add food coloring to a plant?

Ive heard of people changing the colors of roses by using a needle and injecting a small drop of food grade dye into the stem and multiple colors in multiple places. (Rainbow roses are done this way and with slices to the stems) But we dont smoke roses....and I dont think I would smoke injected cannabis either. I'm not sure why someone would want to artificially color their plants? Whats the purpose? To convince someone you've grown something unique? Not hating just dont understand why...
It's ok to hate it's a stupid idea.
 
Bet you could do it in a DWC system.... my current grow

I got a small dwc in a empty pinesol container and solo cup too.... I'm totally adding coloring tomorrow.
What color though????
 

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