That's the September bit. Frosh would come in, get shell accounts, discover USENET and drive the regulars nuts. Then after a few months they'd acclimate themselves or get bored and USENET would settle into normal, only to repeat the cycle next September.

When AOL flipped the switch enabling USENET newsgroups in the fall of 1993 it was an "eternal September" because AOL had an endless continual stream of chuckleheads getting online foe the first time and not acclimating to existing net culture because they think the network is there to serve THEM.