Would be cool in the future for people to build huge houses and have like 10 people race breaking through it to get to the prize chest hidden inside, and on the pvp servers not only a race but a no holds bar kill the others to ensure the prize is yours. I think this is more or less something players can put on and control but would need help from the devs to make it a reality.
1) yes pve cant destroy buildings but you can build mazes with palacaid walls.
2) devs can make these types of events on the job board so people can sign up or even pay entree fee set by event host.
3) add the ability to not tame but capture beasts to put in house or maze to make it even harder.