My pastor was previously in Bluefield, WVA, and knew the man who died. Unfortunately, we are both travelling right not and have not had time to discuss his situation. However, she did get some insights into the practices while in Bluefield. Snakes are often kept in a cold place until they are brought into the sanctuary. This means that the first ones to handle them are at very little risk, since it takes a while for the snakes to warm up. Second, it is possible to build up tolerance to strychnine, and it was used in medicine at one time. Getting bitten nonfatally by a pit viper will also build up a tolerance to the poison. Third, snakes can control the amount of poison they inject, or whether to inject any at all. The fangs are separately controllable, so a snake may bite with both, one, or none. The worst time to get bitten is when the snake is eating. At any rate, two people being bitten by the same snake may have very different reactions, or none at all, depending on the amount of poison injected. If the snake has been milked, another practice to render them less dangerous in the services, it may take some days for the poison to build up again.
Though a number of posters have laid responsibility for this event at the feet of Sola Scriptura, I would say it is symptomatic of a larger heresy, namely Cafeteria Christianity, the using of one small part of Scripture without considering the overall context of the whole of Scripture. This is a heresy that has prevailed throughout the ages, and shows no signs of letting up, regardless of religious affiliation. It even affects our Atheistic brethren, who look at snippet of Scripture or religious practice and condemn the whole of it.