As a mormon (albeit less active) -- yeah Caffeine is allowed " at your own discretion, depends on the mormon, some take it further and abstain it's a personal choice-- but gotta say I love sodalicious, was intrigued to find them making national news and on hackernews of all places. My favorite concoction is: Mountain Dew, Grenadine, Watermellon, and Extra Maraschino Cherries.
What's the best way to prevent a mormon from drinking your beer?
Bring another mormon.
Are mormons allowed to drink caffeinated soda? I only saw one recipe in that article that was caffeine free.
The Mormon code of health only specifies coffee, tea, alcohol and tobacco as unhealthy [1]. Some Mormons also choose not to drink any caffeine or even any soda at all, but most just avoid those key things.
The article is a bit sensational, of course. I'm a Mormon and I live right in the middle of all this and didn't even know it was a thing.