MIRI is entirely Blue Team - they work to create theoretical [0] safeguards on AI agents yet to be developed. I've long envisioned a counterpart Red Team that does nothing but build AIs that attempt to subvert these safety features, since the rest of the world of non Friendly AI [1] research is only unco-ordinated para-red behavior.
[0] In the sense of "valid under these known precepts", not "speculative".
[1] Non "Friendly AI", not "non-Friendly" AI.