I have em but ride in the woods like im on a real dirt bike most of the time with 10-12 psi in the rear tire, I never go below 14-15 psi in the front.
For dual sport rides where I keep 15-20 psi in the tires they're not needed at all.
Side note, your asking for trouble running less than 12 psi in the front tire, if you hit a rock or root you will get a pinch flat or dent the rim. I run 14-15 psi for this reason, any less and I hit the rim on rocks and roots. I can see running 8-10 for sand without rocks for flotation but that only works where theres no small hard objects hidden in the sand.