"Constructive Eviction" - Any inventive ideas or personal experiences (on either side

I recently came across the term "Constructive Eviction" it refers to the action or lack therof of a landlord to render property uninhabitable.

I got to thinking how could a Landlord do this? not in the moral sense but the real sense.

If for example there were people illegally occupying/long term trespassing on property what could a Landlord do or refrain from doing (legal or illegally) to make the property uninhabitable - Stink bombs, flood the land in question, loud noises at night?!

Any inventive ideas or personal experiences (on either side of the fence) are of interest.
G