Would be an interesting idea if a player was able to equipt a wooden stake that can be placed on the ground, it would look just like the wooden stakes that are placed on siege maps near castle walls. It would take up 1 slot, and would merely serve as an impassible object until destroyed. It would be high enough to jump over (but alike the spike barricades on siege, they will be annoying if you cannot do a running jump), it also would cause horses to rear if they try to bum rush through a crowd in a building and collide with it. IT would take a few seconds to deploy as well (ty MrShovelFace)
The object would ONLY be usable by defenders. As of now they cannot use hardly any siege equipment, and would be nice to help keep the maps dynamic and exciting every time.