Better answer would be: "
I will overnight you instructions with FedEx and call you tomorrow to confirm they got delivered" kek
I'd say lots of doxxing can come from username reuse + some personal details (even if you don't reuse your username elsewhere).
Just as an example, let's say someone prints all my messages out and toothcombs through all of them. He will quickly learn that I am an obese slav living in the US, I was a kid in 1990s (so I am in my 30s) and I work in STEM related field. Still too broad to doxx me right away, but just based on this info alone, your doxxsearch pool already shrank by a factor of 1000x or more. If you keep digging, you will eventually close down on at least a state where I live or work which will still leave you with thousands of people, but not millions you may have started with. Going through some hobby posts, political views posts etc. and such you will keep closing in and I am afraid you will be able to get painfully close to my real identity just based on the contents of my messages alone. Especially if you are a fbicel and have access to data most people don't.
It's easier than one may think tbh - I successfully pinpointed a few people online before, just based on their online presence (without even going into IP logs and other shit available to NSAcels), so I would say that if you are really worried about potential doxxing, the best way would be to abruptly abandon your screen name at some point and start fresh and never admit openly you are the same person (otherwise it will defeat the purpose)