DeletedUser7990
All I can advise is having a full and active friends/guild list that can keep your houses motivated then they can't be plundered. Everything else can be set to collect at times when your online.
Don't get annoyed just play to the best of your ability given the time you have available. If someone manages to plunder you then they are only doing what the game designers intended.
A building which is motivated can't be plundered? That's news to me.