That said, I am not convinced that the amount of spam you receive suddenly dropped by your own implementation of the suggestion you made.
No, probably not. This was more of an idea on principles than much else. It would stop people from having to run their own workarounds. It just seemed logical.
And the general idea of a stop-gap measure is that the webmaster would implement it first, then when they next upgraded the board creators would (hopefully) have implemented it themselves. So no more quick-fixes.
But as you say it's probably not worth the bother..
It was just an idea. :P