Most every reptile enthusiast I know LOVES it when someone makes the mistake of categorizing snakes as "poisonous." That way they can be a tad bit pedantic and pretentious about getting to correct the person and inform them that snakes are indeed venomous, not poisonous.
Just thought I'd share a cool little article about a species that is indeed poisonous.
http://blogs.discovermagazine.com/no...-their-poison/