13. Anonymity basics: Identity trace
13.1. Your historical trace

Your historical trace is all your past passwords, past nicknames, past profile pictures, past photos you shared, past posts, interests, anything that can have connection with anything else. It goes like a web for anyone hunting you down. When you want to make sure anything else that they can find on the internet cannot be attributed to you - you need to cut the trace.

It will not wipe what already is up, but you can pretend to be someone else entirely unrelated to anything else that there is available about you on the internet. If they wanted to hunt you down they would get stuck as now since there is no connection - there would be two unrelated webs of information, and impossible to connect if you are consistent with keeping no ties between them.

13.2. How to cut off your identity traces

The easiest method is to never display any of the above characteristics. No same name, no same password, no same waifu pictures, no interests etc. The easiest way is to use generic and default everything and share no more information than absolutely necessary.

It is preferable to change your fingerprint when doing so. The easiest way is to install TOR browser because you would look like any other TOR user. In your regular browser - custom fonts give people away, you settings give you away. Unless you want to customize your separate config forever - it is easier to just use the TOR browser.

I randomize my names, randomize passwords, keep them in my password manager, keep defaults (unless they are local things like custom CSS). I do not talk, I do not react. I do my business and that is it.

13.3. How to manage multiple identities

Password manager can keep anything. Names, password, URLs, etc. Anything imaginable. You can also keep notes and you can look them up at any time. You can make up a personality and keep notes of what that personality behaves like. When making a post as someone else please check whatever you send 3 times whether it aligns with that made up personality and is in no way connected to whatever you like or do personally in reality.

For easier management you can use Whonix or Tails to make sure every file is completely separate and avoid posting waifu pictures, sharing cookies, sharing fingerprints etc. A separate clean system for anonymity like these two is a no brainer method to keep stuff separate.