Is your feature request related to a problem? Please describe.
Suppose I have a house near the village. And I have blasting furnace/anvil/etc. (any block that qualifies) as working station placed in the yard or in the house. It will attract jobless villager, they will convert into villager of corresponding profession and will hang around your house for the rest of the time.

Describe the solution you'd like
Enclosed Working Station is block inside of which you can place block that qualifies as working station. It is usable for player as normal after that, but villagers won't register it.

Describe alternatives you've considered
Obstacles for villagers and placing and then removing working station after each use. Both options are technically easy to implement, but annoying in practice.

This does not fit in the philosophy of this mod. This might be a good idea for another mod.