Creating your own coordinator that no one else uses or using one with a small userbase makes very little sense. You want the group to be as big as possible to improve the privacy aspect of things. One tree in the clearing isn't a forest. That's why most people will go with zkSNACKs, the same zkSNACKs that pays blockchain analysis firms to investigate your bitcoin, and therefore the coordinator shares their ideals that not all bitcoins are equal.