Heh - he once thundered at me for using the smiley, , in response to some of his postings, choosing to take a tack that it amounted to the sticking out of the tongue in mocking fashion.
I explained that there are a limited number of available smileys (I approve of that) including ones to respond in recognition of a bon mot, a belly laugher, a wry, amusing post, and so on - and that if my intent was to fling insult, I would make it abundantly clear.
He was not mollified.