Neil, I don't see the reason to continue this further, but no, your OP was not polite. (Indeed, I've already said it was aggressive and I think Queentess has seconded the point. I won't claim to speak for her though.

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You may have said everything in a very nice tone, but that doesn't make the CONTENTS polite. You made a lot of assumptions about posters based purely on whether they had a certain field in their profile filled out, and well, I was raised to consider judging others based on their online profile to be a pretty rude act. (Momma was very specific about internet protocol.

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Giving me a I DIDN'T DO NOFFIN RONG flounce isn't going to somehow change the fact that your OP made a lot of rude assumptions, you've been called on it, and now you're trying to damage control. I'd prefer you just said, "Yeah, maybe that was a little ranty of me, I'm sorry, coffee time" like everyone else on the internet.