Doxxers.

I say I like apples. Someone else thinks I’m literally Satan for that and need to die in a fire for promoting the apple agenda. They have more work to do under my current username if they want to get my home address and beat me up, or send a SWAT team after me. Just giving out my real name makes it a lot easier.

I’m a nobody, but I’m a nobody who likes to say things on the internet sometimes, and other nobodies can be crazy sometimes. Or sadists who don’t think I deserve to die in a fire but sure think it would be funny and want to see me post about the attempted arson.

I can think of several reasons off the top of my head.

Perhaps you want to discuss things your boss doesn’t want employees talking about (teachers discussing drugs/alcohol/nsfw stuff or anyone trash-talking their employer).

Perhaps you want to discuss things your family/friends don’t approve of (closeted LGBT, political opinions, drugs/nsfw, mental health, even stuff like motorcycles).

Perhaps you want to discuss controversial topics and reduce the chance of having some lunatic send you death threats.