I think the point is that it's on Twitter. Sending an email directly may be welcome. Commenting on PR (if open source) is also probably welcome in most circums

I think the point is that it's on Twitter. Sending an email directly may be welcome. Commenting on PR (if open source) is also probably welcome in most circumstances. It's the difference between pointing at an ESL speaker and saying they talk funny in a group social situation, versus pulling them aside and letting them know they're using some words wrong. Some people are OK with being publicly called out, but more people will feel like they're being given constructive feedback rather than publicly called out if you talk to them directly