What do you suggest? This is basically unpolicable in a world with anonymous ways of getting people to see text.
It's actionable constructive advice.
What narrative? Your comment is vague. Would you mind expanding on this accusation and how it relates to open source, especially when today's maintainers on platforms like GitHub and GitLab have an array of tools at their disposal to deal with issues?
Was merely remarking that the public domains are incredibly rude areas and the reality of the difficulty of existing within them.
Try using the language in that email the next time you talk to a cashier and see how long it takes to get you escorted from the premises.
The “don’t feed the trolls” or “just accept that people do this” nonsense has just meant “let scumbags do stuff they’d never be permitted to do in person” as much as they want with no consequences.
It would be trivial for Google to verify this email did come from an actual Gmail account, and then provide information about any associated accounts if it was - their entire business model is built on doing just that.
While we can try to improve the reality, it is the reality today and difficult to improve. There is always a small percentage of people that are bad.
I maintain a couple semi-famous open-sourced projects and get a criticism (of course a milder one than what OP got) once in a while. I read them and only take what is useful.
I always always thank them for feedback whether the feedback is good, bad, or abusive. I never argue that the users are wrong. I might help correct their understanding, but I'd say: I can see why it can be misunderstood.
This is because, if you start arguing with users, it leaves a bad taste in other users even if you are right.
I used to look at one open-sourced project where the maintainers taunted the users to implement the change themselves because it's "the benefit of an open-sourced project". It kinda turned me away from the project.