Just two examples - the link shows a few more. They get caught every once in a while, but considering the shouting down of the examples of discrimination the movie "Expelled" exposed, it's probably safe to say that penalties for discrimination by the scientific community are about as rare as a speed limit violating driver receiving a ticket for every time he speeds.
Discrimination is everywhere. It's the entire basis of how people are hired. When I start looking for jobs four years from now I'll be discriminated against on the basis of where I've published any papers, who my supervisor was, which university I studied at, and so on.
It's not enough to show that discrimination happens, you need to show that it's bad discrimination. A scientist who supports intelligent design has shown themselves to believe in non-scientific claptrap over scientifically evidenced theory. That's a problem. In a physicist that might be okay, for a biologist it's a failure fundamental in their ability to do their job.
The problem isn't religion, it's believing in drivel. Just as bad as arguing for the phlogiston theory of fire.