A photo of human excrement and soiled paper has renewed calls for better toilet facilities on the mountain.
The collision happened on Tuesday afternoon.
The man returned from holiday to huge bills and aggressive strangers at his door.
There are fears they will be extinct within 10 years.
He will appear in court this week.
"Anything that gives motorists an extra couple of seconds of visibility is a good idea."
It's one of the hottest days central Otago has seen so far this summer.
If you know who these guys are, police want to hear from you.
Otago Polytechnic's site calls the ad "a bit cheeky", but others are switching off.