ac500u, I am pleased that you have gained confidence from the posts in response to your question. You clearly believe that the information that I offered, to the effect that as the pilot of a landing aircraft you may not be aware or be made aware of some activity that is taking place in an area of the aerodrome that is not available for landing, is incorrect.
Having spent the best part of 30 years dealing with such matters, I can assure you that in certain circumstances this may well be the case. For the benefit of anyone else reading this I would suggest that touching down before a displaced landing threshold is highly inadvisable. To re-iterate my earlier comment "A displaced landing threshold is the start of the runway for a landing aircraft".