pRICK
Striker
Ok. So "their" is the possessive, like his or hers...but you know, can be applied to all genders.Their? "It" was added because whether male or female he or she is an idiot.
How does using "it" have any connection to whether you think someone is an idiot or not? When people use it in the case of he/she/it, the it is a way of disparaging someone's presentation of gender.