misplaced @trust?

[Walter Bright via Digitalmars-d]

On 2/5/2015 11:49 AM, Andrei Alexandrescu wrote:
> As much as I was shocked about the use of @trusted/@safe/@system in std.file,
> std.array and sadly possibly in other places, I found no evidence that the
> feature is misdesigned. I continue to consider it a simple, sound, and very
> effective method of building and interfacing robust code. An excellent
> engineering solution that offers a lot of power at a modest cost.
>
> I do not support this proposal to change the semantics of
> @trusted/@safe/@system.

I agree.

So the question is, what does @trusted actually buy you, since the compiler 
can't check it?

It serves as notice that "This function merits special attention during code 
review to check that it has a safe interface and that its implementation is 
correct."