I, 1993 or thereabouts I read a footnote in Robert Nozick's Anarchy, State and Utopia that presents an argument in favour of vegetarianism. As a result, I've been vegetarian for around 20 years. Not particuarly absurd.Using philosophical theories to inform real life behavior or anything remotely like it produces absurd results.
I could give other examples, too, from my own life or the lives of others, but that does run the risk of getting into politics/religion.