Fans collectively may, especially if expressing interest in some organised or consistent manner, coalesce into fandom, or be known as a fanbase, particularly when they are fans of music groups. Non-sports fans sometimes self-address as the fen.
In a few cases, fans may become so obsessed with the (presumably human) objects of their infatuation that they become stalkers.
The fan (aficionado) should remain distinct from the air-movement device.