it's what happens when people are left to their own devices and have the ability to simply stay at home, not work, and be socially isolated... no measuring stick by which to measure themselves and weed out strange behavior. Tends to happen to guys 'in their mom's basement' and middle aged overweight women supported by their husband's income.

Even normals with active social lives can have strange personalities, but more due to impulsiveness and high testosterone levels craving the need for excitement.