Can Any One Know If He Is Ghosted

Just go to the settings tab at the top right of this page.

If you're asking if you are a ghost then no you aren't. I am not sure if it tells you if you become ghosted but to be ghosted you need to be pretty disruptive so just don't be disruptive and don't upset the balance of the community

The same goes for banning. Just follow the natural order of things and you wont fall in to any difficulty, break the rules or become disruptive, abusive, demanding etc. and it's goodbye