I have an arboreal snail whose diet consists of largely fruit, would it be feasible through its natural bodily processes it turns part of these fruits into palatable alcohol to secrete as a defense mechanism to ward potential predators off?
A frugivorous snail could definitely use alcohol to defend itself. Fruit flies do this now.
Here, we show that exposure to ethanol reduces wasp oviposition into fruitfly larvae. Furthermore, if infected, ethanol consumption by fruitfly larvae causes increased death of wasp larvae growing in the hemocoel and increased fly survival without need of the stereotypical anti-wasp immune response... Finally, fly larvae seek out ethanol-containing food when infected, indicating they use alcohol as an anti-wasp medicine. Although the high resistance of D. melanogaster may make it uniquely suited to exploit curative properties of alcohol, it is possible that alcohol consumption may have similar protective effects in other organisms.
Fruit fly larvae have really amazing ethanol tolerance. I once did a home brew cryogenics experiment and found that fruit fly could survive living in vodka-soaked food if they had enough water once they came around. Exploiting that tolerance to kill parasites makes sense. It also makes sense that other organisms which live in rotting fruit might use ethanol the same way and I am specifically thinking of slugs.
High school research project!
1: Acquire slugs from rotten fruit.
2: Incubate some with ethanol and fruit, others with just fruit.
3: Offer slugs to harvestmen - spiderlike slug predators. Do the harvestmen reject the boozy slugs?
Back to the question - yes, very plausible and very cool.