I am not for protecting children at all costs. If this makes me a monster, so be it. I think an individual has the right to due process and that a simple allegation should not, in itself, defame said individual.
McQueary could have stepped in, removed the child from the situation, taken the child to the hospital, and then called the police. At that point, the police would have access to McQueary's statement, the child, plus the hospital evaluation.
Paterno only had a report, that may have been highly uncertain. Paterno had the trust that the AD would investigate the issue. As the evidence gets stronger from the investigation, then there may be a threshold in which you remove Sandusky from campus; however, that threshold is not a simple uncorroborated allegation, in my opinion. IF that was the standard, then an organization could in theory receive uncorroborated allegations regarding all of their employees and then have to put them all on paid leave while they investigate. Certainly, that is not the way to do anything.