I do and for the same reasons that you pointed out, it is as much as anything else.... a way to get them to THINK!
like you, I think it is rude to attack another's beliefs.
I try to avoid that.
personally I have had the best luck with atheists and agnostics. most of them consider them selves pseudo-scientific. because of my background, I find it easier to pop their bubbles than the starry eyed..... "spiritual" people. many are actually Deists. but we humans are not as smart as they think we are....