This post is mainly about semi-technical points about identifying people. Read if that's what you like.
If you decided to troll reddit, would you give enough identifying information in your post history to allow people to narrow you down to one person?
The thing is, most people don't know how little you need to identify someone. I did identify a few people on Hubski practically by accident, informed each of them how I did it… and now all of those posts containing sensitive data are deleted. They didn't just censor them, all of those posts were purged for some reason that I will leave to psychologists. Are they now impervious to being 'doxxed' by someone else? I would argue: no. It's easy to narrow down the possibilities if you bother to take any interest in the person. I mean, wasn't that stupid He Will Not Divide Us flag's location identified by tracking something as simple as star positions and aeroplanes? You don't think about something as being sensitive data, but it's fucking obvious in hindsight. Trolls are people, and like all people can make mistakes.
Also: do this EFF test and click "detailed results" (or something like that). Unless you would go out of your way to secure your browser it's very likely that your current setup is unique in their data. It's scary, but those are the breadcrumbs. File metadata offer a similar amount of information. It's not a perfect analogy, but that's a good demonstration of how powerful those techniques can be.