![](/static/f79995a8/assets/icons/icon-96x96.png)
![](https://lemmy.ml/pictrs/image/1f910de9-62b5-43a9-8c93-94821c945577.png)
Malicious instances would need to be blocked by the instance you are registered to.
As for multiple accounts - couldn’t the same thing be done on reddit? Just make a bunch of alts and self-inflate your own posts/comments.
These issues are as old as the internet and can only be mitigated, not prevented.
Or more likely - you pressed f12 and edited the text for a joke. Still funny tho.