Attacks of Opportunity with a ranged weapon seems like an insane concept. The way I understand it, if a creature were to move within range of a PC's light crossbow it would trigger an AoO. If so that makes ranged weapons way too powerful, and brings up the question of whether making a ranged AoO gives another creature an AoO on you. This concept just seems like one endless series of AoOs.
Am I misinterpreting something, or are ranged weapons just that strong?