The problem with getting someone from a band named "Slayer" is that it won't reach the most critical people we need to reach.
I saw a picture of Betty White holding a snake. She would be a perfect spokeswoman for our cause, if she believes in it.
My mother and grandmothers wouldn't take the time to listen to Kerry King from Slayer, or any other tattooed, rough looking guy talk about snakes. However, put funny, adorable Betty White on camera talking about how amazing these creatures are, and it will reach so many more people.
A big rough, tattooed guy holding a snake won't help our image with the general public. A lovable elderly woman holding the same snake with a big smile on her face can definitely change some perspectives. It probably won't cause people to get over irrational fears of them, but they might think, "okay, they still aren't for me, but I guess they're not so bad after all."