Yes, I am aware of that - for example, my hobbies are a small enough world that even omitting names and exact locations it wouldn't be hard to dox. And there are known and admitted informants here.
That's saying nothing about smartphones and how much data they leak anyway without most being aware of it - but it's like a sieve in most cases. An example of this is, I went to a show recently and all of a sudden people from there came up as "people you may know" on Facebook - despite the fact I have never used the FB app on my phone.
And FYI I mentioned the Mid-West on here, but the particular city I believe was only mentioned on your site & we know from experience that most people do not click on links to your site or any site, but you're right that's poor OPSEC if you have a dedicated adversary.