I know this has been said before, but I'm going to say it again...
I absolutely love your pool and I love everything about it, EXCEPT that you can't remove workers completely. Even if you can't put the option into the DB, then at least give us the option to Delete it and just set a Flag in the DB and don't ever show us that worker again. Later you can go back and remove all those deleted workers, but it can be quite a hassle trying to modify workers and remembering who is who when you screw up as much as some of us do.
When working with databases it is always much easier and preferred to mark things disabled/inactive rather than outright deleting them because you end up with holes in the sequence/record of events happening in the system.