Speaking of dead threads...

So I was looking at dado blades today (for no good reason), and I came across the concept of "zero clearance inserts" for tables saws. I was curious and it sounded like a good idea, so I did some more googling. Finally came across this website.

Now, this procedure/method generally sounds like a REALLY BAD IDEA(tm) to me, but I was curious what the real woodworkers thought.
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I didn't do it, no one saw me, you can't prove anything.