They'd be completely blind if was never even mentioned to them. That said - do you think Samueleson or Holmoe were at that game and did the asking of that girl to change her sign? Probably not - they heard about it either through people reporting it to them or through the request for an apology. Either way the point is whether anyone even cares or polices their fan base and it is obvious some attempt to and some have no desire to attempt to.