[rcthompson]

Yes, it feels grammatically weird, because e.g. you use "is" for he and she but "are" for they. But there's no option that isn't a compromise in some way. The alternative is coming up with an entirely new pronoun and convincing people to use it, and people have tried that as well. It seems that the singular they is much more widely recognized, though.

[toasterlovin]

FWIW, I think new words are easier in this case. This new usage of “they” is really confusing when you come across it. Typical usage of first person “they” implies a degree of unfamiliarity with the person in question. So using “they” for someone who is known causes you to question your reading comprehension.