I went on to read what that KSU website had to say about it. It said not to worry about it! It doesn't eat the live plant it's on--it eats bacteria and dead matter.
I have read elsewhere that there are a number of different types of slime molds. Some DO look like Dr. Dawg's. There's a bit of sidewalk a couple blocks from my house that's infested with a slime mold that looks like the flat, gelatinous kinds of seaweed when it's active. When it's dried out, it's a layer of dull greenish-brown on top of the concrete.
