All of this is basically:

* shitty people scamming other people: Yes, everyone knows. It happens with normal money as well. I regularly get "How to avoid scammers" emails from my bank too. As long as something has value someone will try to use it to scam someone else.

* mining: Yes we know, mining is bad. Nobody wants it, it's going away. Could it go away faster? Yes, but it will happen eventually. Ban mining for all I care, nobody really needs it.