Shouldn't this be theoretically possible? If you've never revealed any personal information publicly on any accounts you have, there shouldn't be anything to be doxxed with. For example, if I have made only one social media account (let's say, Twitter) ever and I have never uploaded any personally-taken pictures, followed any family members, or revealed anything about my name or address (and used a burner email) it should be impossible to figure out any of my personal details. Though I will agree that it gets exponentially harder to control the information available about you online the more you use the internet if you don't pay attention to it.
Theoretically, yes, in practice however it really comes down to how badly someone wants to figure out who you are. Realistically in the example you provided, the only people who could reasonably get ahold of your information is the government, an ISP, or someone with tons of computer skills and no morals. Unless everything you post is extremely cold and robotic, someone with enough time and energy can glean info from something as innocuous as "I had ice cream today" or simply the way you write. There's a good deal of people with threads on this site who were found out through such seemingly irrelevant details.
If the autistic hivemind can triangulate the position of shia Labeouf flag using air plane patterns
AFAIK, the only piece of information that the account could give away would be an IP address which (again, AFAIK) isn't worth much because it only provides a general idea of location - and I'm not sure (unless the account is on a badly-made and seldom-used website) someone with l33t h4x0r skills could even get that (AFAIK, the IP would have to be stored somewhere for them to get to it, and they'd have to find a way to get access to the database containing user IPs - which would be a massive breach of security (not that it doesn't happen, haveibeenpwned.com has many examples of such cases, but it'd be very, very notable)). ISP and government are fair game though.
If you've got examples of this (lolcows doxxed by this method), I'd love to go through them to see what exactly gave them away. I can't see any logical way to go from those statements to personal information without the doxxed person having accidentally provided other personal information first (e.g. location precise enough to identify city and area of said city, etc.) though the way someone writes could very well be used to link different accounts together (the doxxer would have to first find those different accounts which I don't think is particularly easy or even possible in a reasonable span of time without a lot of luck).
Could you elaborate on this? I don't quite understand. Other than website owners or people using link-based IP grabbers (and governments/ISPs) I don't see how someone would be able to exploit something like this. The ordinary Kiwi Farms user probably wouldn't be able to (AFAIK of course).
