/Local Chat doesn't allow the word "Them"

like lulwut? You can't type "eat them" or it comes out *** ****. This came up as I was typing "Don't go or your children will die! Drifter will eat them!" and it came out as "Don't go or your children will die! Drifter will *** ****"

You can type "eat" by itself, but you cannot type "Them" or "T h e m" but it's perfectly okay to type "they"

what and why would the word "them" be filtered?