In 1984, could O'Brien be vaporized in the future?When I was reading 1984, the fact that Syme was vaporized, presumably for exhibiting independent,...

This is a very interesting idea to think about, and you
might benefit from moving this question to the discussion board of this group where you
would get many more responses. However, just initially, Winston Smith is not vapourised
as we assume Syme is. Smith is broken, completely and utterly, by
O'Brien.

Let us remember though when we consider this
question that the model for this world, Stalin's Russia, was one that was famed for its
purges. A key aspect of this was the way that those involved in leading the purges
(which were responsible for the deaths of millions of Russians) were themselves victims
of later purges. Stalin was notoriously paranoid, which could perhaps explain this.
However, the society in 1984 is one which denies safety to all of
its citizens, and therefore I think you are right in thinking that O'Brien at least has
the potential to be purged later on in the world of this novel.