A small preview of what it COULD look like.
Require a CAPTCHA to be typed in prior to clicking "build" at house demolitions. This method will take care of all the bots at them.
Make the CAPTCHA 6-12 letters at random and some letters more visible than others, so the same person doesn't win every single house demo too.
Setup a way to record the typing in of the CAPTCHA, so if people try to bypass it with modified game files you can easily check it and ban them.
A really awesome idea. Once again, please implement it if it is possible.
Thank you!
EDIT: To add to the OP;
They are implementing a CAPTCHA system to combat bots very soon. This would be an adaptation of that system.
If this system were implemented, bots would no longer win house demos, nor will one person win all the house demos.
If they introduce the recording of the CAPTCHA put in, then people can screenshot the plot/house the person won and they can check to see if the person typed in the CAPTCHA or if it was bypassed with modified game files.
Having random 6-12 letters per CAPTCHA will enable people with less WPM to still win at house demos.
It is a flawless system and it will get rid of all the bots @ house demos. Only a bot wouldn't like this idea, or someone who doesn't fully grasp it's potential.