I was there too that night. There were tens of El Nokali posters that were distributed. The racial chants directed at Venable were by the entire student section. It was so bad that Yale administrators actually had to issue a formal apology.
I can assure you nothing near that bad ever happened at Jadwin or the Palestra. Things have gotten out of hand between the two schools with some of sexually loaded double entendres, but even that has run its course. It sort of peaked with the firecracker incident and there haven't been problems since.
Most coaches know that Princeton and Penn have the programs they want to replicate and the knowledgable and enthusiastic crowds they would like following their teams throughout the season.