It's not right. There are linguistic restrictions on gender-neutral, singular 'they'.[1] When the referent is known, it can't be used (i.e. it's not about 'patrick' and 'he' matching up, it's about 'they' not being usable with a known person).[2]
My favourite real-life example of it's usage is one in which we know that the gender is female, and we know it's singular:
"If a mother wants to use the nursing room, they can just key in the code in their pamphlet".
[2] I can't help but feel that these restrictions are related to nondefinite contexts for "(negative polarity items)[https://en.wikipedia.org/wiki/Polarity_item]", like 'no-one' and 'any', where you can't say e.g.
It doesn't sound right because the username includes "patrick", which implies a "he". Singular "they" doesn't replace "he" or "she" when gender is known.
It sounds a bit more natural if you say "That user didn't read the article, so they were uninformed."
My favourite real-life example of it's usage is one in which we know that the gender is female, and we know it's singular:
"If a mother wants to use the nursing room, they can just key in the code in their pamphlet".
[1] https://www.reddit.com/r/linguistics/comments/3cgbyv/limitat... gives some good discussion
[2] I can't help but feel that these restrictions are related to nondefinite contexts for "(negative polarity items)[https://en.wikipedia.org/wiki/Polarity_item]", like 'no-one' and 'any', where you can't say e.g.
but you can say: but you can also use it in questions: This seems related to usages like vs