Should I go in a whisper only discord voice channel and scream?
That's mean. Why do you want to do that to the others?
I want to be alone and that's the best way to do it.
It is okay to be alone but you should ask for space instead of annoying them so that they leave you alone. You might get banned and would be alone for longer than you want.
I'm also doing it to cause chaos and get banned.
No matter what your reasons are, it is bad to do it. It would be causing an annoyance that is not fair to the others who want to be in that space.