Has anyone ever seen this red discoloration on the 1982 D Quarter like this

This is just a result of oxidation or some other chemical process. It's something you expect once in a while with copper-nickel (see coin page), though it's rather uncommon. Maybe some liquid sat on the surface long enough to produce this colour. Copper-nickel doesn't tarnish easily, but it does happen.

I have seen quite a few buffalo nickels with a dark red discoloration. These coins are made of copper-nickel. In most cases I suspect they spent a few decades in the ground. I have one or two myself in this condition, with light surface corrosion, and they are therefore worth very little.