Re Next challenge
Robert, are you aware of the Crowd IQ Phenomenon? People in crowds try to adapt their IQs in order to mingle. Given that it's generally much easier to adapt to a lower IQ, the crowd's average IQ settles around the lowest individual IQ of the attendees. At best.
When two individuals both with the same IQ do not get on very well with each other they tend to lower their IQs. The larger the group and the higher its drive to homogeneity, the lower will be the resulting IQ of each individual, which is roughly the same as the average IQ of the crowd. It is called the lowest common denominator of IQ.
This also answers your question: you only need the IQ of the numptiest fan and this gives you an indicator for the maximum possible IQ of the crowd - not very likely a triple-digit figure.