Privacy is a tricky situation. Obviously that dude understood the reason why people post it very wrongfully, kakmakr normally posts a lot better stuff, probably mistook it somehow.
I was just surprised kakmakr didn't know it was the promotion that was used to launch the site.
And people who STILL post their address are definitely a bit behind the days to say the least...
It's actually an out of date account farming spambot. Before merit was needed they used to farm high ranking accounts by getting the posts and activity just posting in giveaway threads. I have no idea why people still try to use it.
However sharing your address does compromise your situation a little bit. Not a lot, but at least it connects you with your wallet address and then you are reminded of it anywhere you go. I used to use another address, and I remember someone asking me to sign that address to prove I was still the same person and did not sell my account or something. Thank God that I had access to it, and managed to sign it, but that shouldn't even be a thing in crypto.
So, to answer your question, yes participating with an address "doxxes" you in a way, not like my real name and home address level, but still it sticks me to this corner and doesn't allow me to move somewhere else.
The thing about privacy is that you just need a little knowledge to protect it. Posting an address isn't a problem if you know how not to then connect that address to your other addresses.