Fire and Smoke Alarm disabled/disconnected

I’ve come across a number of examples of interference with fire and smoke alarm systems.

Tenant sticky taping the smoke detector just so they can smoke in their room.  How would that person feel if a fire broke out in their room and it caused the death or injury of a fellow tenant.

Disconnection of smoke alarm so they can smoke in their room. Fortunately this flags up on a working system.

Viewing two apartments in the same block to find that all the alarms and sounders were disconnected. This means that the whole building is not protected.  Landlords are taking a great risk as are the management companies of apartment blocks if the fire alarm system isn’t tested regularly.

Morally though who in their right mind disables a smoke alarm without considering the implications on the lives of others.