I have had a house demo'd (because I wanted it to be) you get email after email after email telling you its gonna happen and how to prevent it. SE gives you plenty of warning and tells you how to halt the demo. Also this is widely talked about by people who have had this same issue.

It's a good system when housing is so limited. It could be improved but still not game breaking. This is not a SE issue, this is a failed to read the 10 emails SE sent issue.