How about pure spy builds? How about OSW? Having an unstripable plunder allie that is an alt you only play to avoid getting it deleted once every few month, destroying the castle immediately again... BACK TO THE DRAWING BORD.
Support. Would also like the ability to lose buildings in a similar way, eg, are x amount of successful attacks against you, you lose an attack building. Same with spy.
It actually takes a lot of hits to clear someone. There's a weird person trying to farm me right now and 60 or so hits in I went from 40 to 38 billion. I traded a few hundred hits each with some guy off the battle list for a few days and lost maybe 10 billion max. I never have over 200 billion out. I know lots of players stealing and crystaling will eventually get all the gold, but it would take a lot of time, money and resources to get the kill for just one player.