* blogging from an oppressive regime
* to isolate yourself from online mobs
If you write something controversial these days, sometimes it catches a wider audience and you can find yourself under a lot of attention. A minority of those poeple will not be nice, and may send death threats or worse. Your experience is a tiny fraction of what this can be like. Being anonymous takes out some of the sting.
I can't think of a better illustration of the latter than https://metro.co.uk/2020/07/04/last-us-2-voice-actor-shares-....