Can an account be removed or forcibly transferred?
Suppose, as an example, that the Wikipedia organisation wants a Steemit account, could the existing (inactive and otherwise crap) wikipedia account be removed or expropriated or forcibly transferred to the real owner of the Wikipedia name?
Not without a hard fork, which would require consensus among Witnesses.
Since it would fundamentally opposed to the concept of Steem, witnesses who attempted to impose such a hard fork would almost certainly be ejected by stakeholders.
Realistically in your scenario Wikipedia would find it much easier to simply buy the account from the existing owner.
True, but that would require finding the existing owner, which may not be possible.
So, if somebody somehow impersonates an organisation or living person, the account can be nuked into negative reputation, but it can't be removed or transferred without a hard fork. I wonder if refusing a removal or transferral request by the owner of a name or brand could expose Steemit Inc. to litigation, but fortunately I am not a lawyer so I am not going to think about it.
We may find we have many battles with the state in our future. Consider links to child porn embedded in the blockchain, etc.
It would be good to face the scenario in your post before we face that battle.
At the current point and time i don't think there's a way to do that. Unless the person who owns the name hands it over.
No.