OK, I must speak to this. It's been bugging me for months, ever since I learned better.
When you're referring to a non-gender specific individual, the correct pronoun usage is "he/she." To say "they" when trying to avoid using a generic pronoun (now that everybody is afraid of "he") is ridiculous, and indicates a plurality where there is none.
Example: "If anybody wants to go to the park, they should should sign the permission form first." Sounds right? Wrong. "...he or she should sign the permission form first" is the appropriate way to say this.
You may now consider yourself smarter.
Next week: "They're, There, and Their: Why The Confusion?"