I do use dial dots, but only temporarily. They are perfect for holding the dial spacer in place while adjusting the position of a slow cure epoxied DWO. As previously mentioned, I use the actual movement and dial when doing this and it can sometimes take a dozen dial placements and removals to get all the numbers centered. I don't check every single number after every adjustment, usually checking halfway around the overlay will reveal a problem if there is one.
It would be maddening to have to deal with a spacer placement on each of these iterations, so I anchor the spacer to the movement with two landscape oriented rectangular dial dots placed vertically, half on the spacer edge and half on the movement. This step is a huge benefit in making that process less aggravating.
I have used this same approach a time or two when gluing a dial to the spacer, to keep the two bonded pieces firmly attached to the movement. I find it a viable technique as well, and would use four thin 3-4mm ribbons of JB Weld between the dial and the spacer. It's not as convenient for dial removal as gluing on dial feet IMO, as that requires removing and replacing the sticky dots vs simply loosening the dial feet clamps. But it does eliminate any bulk thickness issues dial dots can create since none are used in a horizontal flat orientation.