evidence and source please
Of what? That people freehandle them? That freehandling Adders has lead to bites? You must be kidding, we all know that has happened. I'm not going to name anyone here, but anecdotes aren't scarce. Many of us personally know several people who have been bitten by Death Adders due to inappropriate handling.
That keepers being bitten affects public opinion and influences keeping related laws? No one is stupid enough not to be able to understand that and anyone who has been in the snake-keeping world for more than a few years has observed it, both in Australia and overseas.