Hey, lookie here! Instead of merely taking y’all’s pedantic word for it, I actually RESEARCHED IT! And it seems you’re on somewhat shaky ground:
http://motivatedgrammar.wordpress.com/2009/09/10/singular-they-and-the-many-reasons-why-its-correct/
My favorite retort: “Singular they”: God said it, I believe it, that settles it. http://itre.cis.upenn.edu/~myl/languagelog/archives/003572.html
Gee, that doesn’t sound all that collectivist leftist to me!
Indefinite pronouns are the real troublemakers. These are singular and need singular pronouns: anyone, no one, everyone, someone, anybody, nobody, everybody, somebody, anything, everything, nothing, something, one, each, either, and neither.
A word like “everyone” is treating people as a group, so it is singular. When using “either” or “neither”, it is one or the other, so you are looking at one at a time, so those two words are singular.
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Above are the guidelines I like to observe.
But don't sweat it, Ticks. Someone like you can knock theirselves (or is it thereselve's?) out all he wants by ignoring any stupid old rules they pleases (please's?).
It's (is it its?) the way of the world now, right? Indeed it puts you in some pretty fine company, including the left-wing pedants at the Chronicle of Higher Ed:
Amen. But this guy knew what was meant...he’s just impressing himself with his own Bravo Sierra. No need for me to engage that any longer.