That's an interesting thought.
Also, this 1976 allegation does not follow-up to describe what Joe said in response (if you're willing to believe it at face value, which I am not). Joe's advice to young people often included them talking with their parents or significant family members about the things that were on their minds. That's what the Paterno family did, and that's what Joe and Sue believed in.
So, let's say a young person did somehow get to talk to Joe directly about this (an unlikely scenario in itself). I can easily imagine Joe telling the young person to go talk with his parents and perhaps even talk with the police. Joe at times directed others to the police when serious allegations were brought to his attention regarding his players.
So, on the small chance that the allegation is true, my first question is 'how did Joe respond to the person?' And we would then need to have the person, who may be seeking a PSU payday, to truthfully tell us what Joe said in response. In this highly unlikely scenario, it is highly likely Joe would have at least directed the person to his parents.