It's not just biomedical investigators who put up with harassment and death threats, of course. Biologists get them from creationists (I even had a very creepy visitor here once after I posted something evolutionistic), but one of the toughest kind of scientists to be these days is a climate scientist.
It's gotten so bad the American Association for the Advancement of Science has issued a statement, something they don't often do. They begin:
We are deeply concerned by the extent and nature of personal attacks on climate scientists. Reports of harassment, death threats, and legal challenges have created a hostile environment that inhibits the free exchange of scientific findings and ideas and makes it difficult for factual information and scientific analyses to reach policymakers and the public. This both impedes the progress of science and interferes with the application of science to the solution of global problems. AAAS vigorously opposes attacks on researchers that question their personal and professional integrity or threaten their safety based on displeasure with their scientific conclusions. . . .
If anything it's even worse in Australia, which happens to be one of the places on earth that will suffer the most -- indeed is already suffering greatly -- from climate change. (And how do they manage, being upside down all the time? Answer that, round-earthists!) Also this.
Australians also know who gets a big fat chunk of the of the blame for promulgating denialist lies and stirring up the dangerous fanatics -- that would be the Australian expatriate Rupert Murdoch and his evil empire. Can we please stop pretending they are in any way a legitimate journalistic enterprise? Is that too much to ask?