Clarification: For the title to be affected by the settings, one must enter keywords and/or description.
Oooooooh, I see! (said the blind man)

So what you are saying is that EVEN if you disable Title/Tagline at the overall Product Type Option level and on the specific product's metatag control page... it will still show up unless you manually type in keywords and/or description?

Wow. Ok.

But that is just plain silly. If you turn it off, it should just turn off. Or that is kinda how I feel.

I have thousands of products, but only a few do I bother manually entering keywords/descripts. For the other 90% of them, the automatically generated keywords and descriptions are just fine. Without hacking the code as I did, then 90% of my site would have the annoying title/tagline.

In my opinion, if this is not a glitch then the thinking behind providing the option to turn it off is flawed.

If you turn something off, it should go off.

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Quick aside, have you guys actually tried this? Or are you going from memory on how it is supposed to work? I honestly believe this is just a simple bug. The off button just does not work.