Earlier quoted context omitted.
If someone, or in this case a set of affiliated someones, have proven to do malicious or ethically questionable things, trust has to be earned. The risk of letting things stay without extensive verification is not worth it and I definitely don't consider this a kneejerk reaction given the potential perception risks.
Hypocrite patches came from Gmail. Banned umn mail. Because that’s going to reduce risk?
This particular act is about avoiding the risk of researchers wasting kernel developers time.
As evinced by the response, it seems really unlikely that other institutions would think it’s a good idea to perform experiments on the kernel devs in the future.