Keith's note: NASA has a Space Act Agreement with the company that runs the Super Bowl. The agreement specifies what each of the signatories will and will not do and how approvals will be provided. JSC has been doing whatever they want and simply ignores the agreement - as well as the NASA Office of General Counsel and PAO at NASA HQ. JSC flew a jersey from every NFL team to the ISS with "NASA" overtly on each shirt. When someone wins the game they will tweet pictures of crew members wearing the jersey of the team that wins. So much for what the Space Act Agreement says.
Doing education and public outreach with large events such as this is fine and should be encouraged. Other events would love to have a chance to get this exposure. But when they approach NASA any interaction such as this is always predicated upon having an agreement with NASA. Why even bother to have these agreements if NASA just ignores them?