This is an interesting question. Given your admission that your identity is loosely linked to your online accounts, I don't think it's possible to prevent someo

This is an interesting question. Given your admission that your identity is loosely linked to your online accounts, I don't think it's possible to prevent someone from doxxing you-- someone just needs to tie it all together. I agree with sibling comments here that the only way to really prevent someone from identifying you from your online personas would be to start over. If you want to truly be anonymous, you need to build these new personas with OPSEC in mind. The process includes 5 general steps: 1. Identify information you feel is critical. In your case, this could be anything that ties your online activity to your real life identity. 2. Identify your threat. This can be simple or complex depending on your needs. Are you concerned about hiding from pissed off gamers, hacktivists, or a nation state? Knowing the enemy you face will help you better understand their potential capabilities to find out information about you and how they could use this information. 3. Assess your vulnerabilities. Look at yourself from the viewpoint of the attacker. What information would you use to dox yourself? 4. Assess your risk. This can also be pretty involved depending on your vulnerabilities and threats. What could someone do with this information? How bad could you be hurt? 5. Apply countermeasures. Figure out how you can mitigate the risk you found above. This may include closing old accounts, creating new accounts, creating alternate personas, disinformation, heading off potential impact from a dox, etc. Hope my ramblings helped.