Oh. My views on this, as usual, are somewhat complex. 
First of all, I am opposed to being disingenuous. However, in this
case, I don't think the Korean Christians are being disingenuous. I
think they would openly admit that they want to spread Christianity
and that evangelism is that ultimate motive. However, they have to
keep it quiet because of the laws against missionary work.
I also don't think the Taliban, or any group, should have the right
to stop missionary work. Missionary work, as far as I'm aware, is
just telling people about Christ. I see nothing wrong with that. To
use a silly analogy, let's say the national chocolate is Cadbury's
and everyone is supposed to eat only Cadbury's chocolate. If I tell
people that Hershey's chocolate is better, should that be a
crime?
I do dislike the fact that in many cases, missionary work is not
motivated by helping people, but to bring people to Christianity.
Of course, to a christian, bringing people to christ is helping them. That's another issue
that I would be happy to engage another time.
As was discussed in another thread, I actually don't see the need
for missionary work or organized religion at all. Why can't people
know god directly? Why do people need to be taught? When you are
taught, it strikes me that you are not getting to know god, but
getting to know what people tell you about god.
So to summarize: 
I'm opposed to converting (oblique or otherwise) people - but only
because I think organized religion is bad.
In principle, I'm supportive of the right to evangelize from a free
speech perspective.