In article ,
Mike Beede wrote:

In article , John Bell
wrote:

Bad idea. Probably 90% of the time it is O.K., but the other 10% is reason
not to.

However, I read somewhere that the controller must specifically mention
if they intend to vector you across the localizer. I conclude this is either
incorrect or widely ignored, because the times I've been vectored through
the localizer, no one said anything. I haven't noticed a lot of radio
traffic,
either, but they might be talking on another frequency....

Can one of our ATC folks comment on my ill-remembered "fact?"

Mike Beede

The controller is indeed supposed to tell you if he's planning to vector
you through the localizer. As you've noticed, it's often not done.
This relatively minor transgression on the controller's part, however,
does not justify your deciding to turn to intercept the localizer
without a clearance.