Shame that some people's work ethics are just that way and don't appear to have much of a conscience.
People such as this installer probably think that if it doesn't affect them directly, why care (unless you sue them, of course).
The sad thing is, if the same thing happens to the elderly or children, just like it did to Geebung, and they weren't as lucky.... :( (assuming Geebung was 'uninjured?' Hope you were OK :U).